Traffic rulesUruguay
Traffic rules
Uruguay
1. Uruguay
Uruguay lies in the Southern Cone of South America between Argentina and Brazil, with the Río de la Plata and Atlantic Ocean along its southern and eastern coasts. Traffic drives on the right, and much of the country is crossed by long national routes through open, gently rolling agricultural land. Unlike some neighbouring countries, Uruguay has relatively little mountainous terrain, but drivers should still allow for changing weather, rural traffic and livestock on country roads. Low-beam headlights or factory-fitted daytime running lights must be used permanently while driving.
Uruguay uses route-specific tolls rather than a vignette. Telepeaje provides electronic toll payment, while vehicles without a tag can also be identified by their registration plate; special options are available for foreign vehicles, including the Pase Turista and Abono Extranjero. Road signs and written instructions are principally in Spanish. Uruguay also has a particularly strict road-safety rule: drivers must have zero alcohol in their system.
AI-generated by Rijbewijs-online.be • WCIT • CC BY-SA
What is the alcohol limit for driving in Uruguay?
Uruguay has a zero-alcohol rule. A driver is prohibited from driving when the blood-alcohol concentration or equivalent breath-test result is above 0.0 g/L.
What speed limits apply to passenger cars in Uruguay?
Built-up areas: The national general maximum in urban and suburban areas is 45 km/h. Departmental authorities may establish and sign limits of up to 60 km/h, and exceptionally up to 75 km/h on qualifying roads. Always follow the posted limit.
Outside built-up areas: On roads and highways outside urban and suburban areas, the general maximum in optimal conditions is 90 km/h for light vehicles without a trailer and specifically authorised buses, and 80 km/h for other vehicles.
Higher signed limits: The Ministry of Transport may authorise a higher limit for light vehicles without trailers on suitable road sections, but the authorised maximum cannot exceed 110 km/h. Such sections must be specifically signed, so 110 km/h is not a universal national highway limit.
Are seat belts compulsory in Uruguay?
Yes. In cars and light passenger vehicles, seat belts are compulsory for the driver and passengers in both front and rear seats. Additional requirements apply to passenger-transport and school-transport vehicles.
Can you use a mobile phone while driving in Uruguay?
Using a mobile phone or other communication device while driving is prohibited when the communication requires the use of either hand. Hands-free communication is permitted under this specific rule.
🔗 impo.com.uy • Uruguay IMPO, updated Law19061, article13 mobile communication
Do headlights have to be used during the day in Uruguay?
Yes. Motor vehicles must use low-beam headlights permanently. Vehicles originally equipped with daytime running lights, or DRL, may use those instead of low beams for this purpose.
Where must children sit in a car in Uruguay?
Act 19,061 requires children aged zero to 12 to travel in the rear seats using the prescribed restraint systems. The same rear-seat and restraint obligations apply to adolescents up to 18 who are shorter than 150 cm. Choose equipment appropriate for the child’s category and size.
🔗 impo.com.uy • Uruguayan Government, Act 19,061, Article 1, children in vehicles
Are motorcycle helmets compulsory in Uruguay?
Yes. Motorcycle users must wear a certified protective helmet, correctly fastened. The requirement applies to both the rider and passenger.
🔗 impo.com.uy • Uruguayan Government, Road Traffic and Safety Act 18,191, consolidated text
2. Pedestrian warning
A pedestrian warning is a traffic warning indicating that pedestrians may be crossing or entering the roadway ahead. It is commonly used near pedestrian crossings or other locations where drivers need advance notice of frequent pedestrian activity.
Drivers approaching a pedestrian warning should reduce speed when necessary, watch carefully for pedestrians and be prepared to stop. The design of the warning sign and the priority rules at the crossing vary between countries.
Wikimedia.org • Andrés Franchi Ugart • CC BY-SA
How should I react to a pedestrian warning in Uruguay?
Reduce speed, look along both sides of the road and be ready to stop. The warning identifies a pedestrian hazard ahead; children, people with limited mobility or others may enter the road unexpectedly.
Does a pedestrian warning in Uruguay identify the crossing itself?
Not necessarily. An advance warning alerts you to danger ahead. The actual crossing is identified by its own signs, markings or signals. Apply the crossing rules when you reach it, and follow any supplementary distance information.
What should drivers know about pedestrian crossings in Uruguay?
Under national law, pedestrians have priority at properly marked crossings and at the specified junction crossings. Drivers must exercise extra caution on approach and must not endanger people crossing.
3. Speed bump
A speed bump is a raised traffic-calming device placed across all or part of a road to make drivers reduce their speed. It is commonly used near homes, schools, crossings, parking areas and other places where low vehicle speeds are important.
Speed bumps vary in shape, height and legal status. Drivers should approach them at a low, controlled speed and follow any warning signs or speed limits that apply.
Wikimedia.org • CITY_MVD • CC BY-SA
How should I recognise and approach a speed bump in Uruguay?
Look for a raised surface, approach warnings, road markings and any separate speed instruction. A traffic-calming device can be part of a raised crossing or junction, so identify the layout and the road users who may use it.
Which speed should I use at a raised device in Uruguay?
Obey the applicable speed restriction and slow further for the device, visibility and other road users. Do not assume that a raised device carries the same numerical rule as one in another country; a safe approach can be well below the road’s maximum.
Does a raised road surface give pedestrians priority in Uruguay?
A raised device alone does not identify pedestrian priority. If it incorporates a crossing, apply the crossing’s controls and the national rules. Under national law, pedestrians have priority at properly marked crossings and at the specified junction crossings. Drivers must exercise extra caution on approach and must not endanger people crossing.
4. Stop sign
A stop sign requires drivers to bring their vehicle to a complete stop and give way before entering or crossing the road ahead. The stop must be made at the stop line or another legally prescribed position.
After stopping, the driver may continue only when this can be done safely and without interfering with traffic that has priority. The sign does not create priority for the driver who has stopped.
Wikimedia.org • CC BY-SA
Must I stop completely at a stop sign in Uruguay?
Yes. Come to a complete stop when the applicable stop sign controls your approach, even when you cannot see another road user. Slowing to a crawl is not a stop. The stopping duty is separate from the duty to give way before continuing.
🔗 impo.com.uy • Uruguay, National Road Circulation Regulation, Decree 118/1984; 🔗 impo.com.uy • Uruguay, Law 18,191, article 17, updated text
Where must I stop at a stop-controlled junction in Uruguay?
Stop at the indicated line or prescribed position before entering the conflicting route. Make sure the road is clear for your movement and give way as required by the actual signs and traffic arrangement.
🔗 impo.com.uy • Uruguay, National Road Circulation Regulation, Decree 118/1984; 🔗 impo.com.uy • Uruguay, Law 18,191, article 17, updated text
Does stopping first give me priority at a stop sign in Uruguay?
A complete stop does not, by itself, give you priority. Give way to the road users entitled to pass under the junction’s signs and rules, check pedestrians and cyclists, and proceed only when the gap is safe. Do not follow another stopped vehicle through without satisfying your own stopping and yielding duties.
🔗 impo.com.uy • Uruguay, National Road Circulation Regulation, Decree 118/1984; 🔗 impo.com.uy • Uruguay, Law 18,191, article 17, updated text
5. Roundabout
A roundabout is a circular road arrangement in which traffic travels around a central island in one designated direction. Vehicles enter and leave through connecting roads, and traffic signs or local rules determine who has priority.
Drivers should reduce speed, choose a suitable lane, observe all road users and signal as required when leaving. The direction of travel, entry priority, lane use and rules for cyclists and pedestrians depend on local traffic signs and regulations.
Wikimedia.org • ANDRESMARTELUNA • CC BY-SA
Who has priority at a roundabout in Uruguay?
Read Uruguay’s signs and applicable junction rules before entering a rotonda; do not assume that circular shape alone settles priority. The national circulation regulations also require a driver leaving a roundabout to yield to vehicles advancing on the driver’s right.
🔗 impo.com.uy • Uruguay, National Road Circulation Regulation, Decree 118/1984; 🔗 impo.com.uy • Uruguay, Law 18,191, article 17, updated text
How should you choose a roundabout lane in Uruguay?
Choose your intended exit before entering and follow the lane arrows and destination signs. Keep to the marked route and make any permitted lane change only when safe; having priority over entering traffic does not give you priority to change lanes.
🔗 impo.com.uy • Uruguay, National Road Circulation Regulation, Decree 118/1984; 🔗 impo.com.uy • Uruguay, Law 18,191, article 17, updated text
What should you check when leaving a roundabout in Uruguay?
The national circulation regulation requires drivers leaving a roundabout to give way to vehicles advancing on their right. Check and signal before changing lanes or leaving, and respect pedestrians at designated crossings. Follow the actual signs and do not cut across another vehicle’s path.
🔗 impo.com.uy • Uruguay, National Road Circulation Regulation, Decree 118/1984; 🔗 impo.com.uy • Uruguay, Law 18,191, article 17, updated text
6. Railway crossing
A railway crossing, also called a level crossing or railroad crossing, is a place where a road or path crosses railway tracks at the same level. It may be protected by barriers, warning lights, bells, traffic signs or a combination of these measures.
Road users must approach carefully and never enter when a train is approaching, warning signals are active or the exit is blocked. They should cross promptly and must never stop, wait or become trapped on the tracks.
Wikimedia.org • TaLu13 • CC BY
When must drivers stop at a railway level crossing in Uruguay?
All drivers must stop before a railway level crossing under article 20. Continue only after checking that there is no collision risk. Obey the crossing’s signals and barriers; the duty to stop is not limited to times when a train warning is active.
🔗 impo.com.uy • Uruguay, Law 18,191, article 20, railway crossings
Must I stop at every unguarded railway crossing in Uruguay?
Yes. Article 20 requires all drivers to stop before a railway level crossing and check that there is no collision risk before continuing. Missing barriers or a separate STOP sign do not remove that duty.
🔗 impo.com.uy • Uruguay, Law 18,191, article 20, railway crossings
What if road traffic is queued beyond a railway crossing in Uruguay?
Wait before the tracks until there is room to take your entire vehicle off the crossing. Do not follow another vehicle onto the tracks without checking the exit. Keep the tracks clear even if no train is visible.
🔗 impo.com.uy • Uruguay, Law 18,191, article 20, railway crossings
7. Curve
A curve is a section of road that changes direction to the left or right. A sharp, unexpected or poorly visible curve can reduce a driver’s view of approaching traffic, stopped vehicles, pedestrians and other hazards.
Drivers should reduce speed before entering the curve, remain within their lane and use smooth steering, braking and acceleration. Warning signs may indicate the direction of the first curve or a series of successive curves.
Wikimedia.org • CITY_MVD • CC BY-SA
What makes a bend dangerous in Uruguay?
Curves shorten your view of the road ahead and can reduce the margin for correcting a mistake. Drivers may encounter open rural curves with agricultural traffic and changing weather; the safe speed can be well below the posted maximum. Watch for changing road surfaces and people or vehicles hidden beyond the curve.
How should you approach a sharp curve in Uruguay?
Slow down before the bend, select the correct lane position, look through the curve and steer smoothly. Keep enough grip and visible stopping distance for the road and weather conditions.
Is overtaking safe on a blind bend in Uruguay?
No. Do not start overtaking where your view of oncoming traffic is obstructed or where signs or road markings prohibit it. Wait until there is a lawful, clear and sufficiently long view ahead.
8. Wrong-way driving
Wrong-way driving occurs when a driver travels against the legally permitted direction of traffic. It may happen on a one-way road, divided road, motorway entrance or exit, or another road section reserved for traffic travelling in one direction.
Wrong-way driving creates an extreme risk of a head-on collision. Drivers must follow direction signs, no-entry signs, lane arrows and road markings. Anyone who accidentally enters a road in the wrong direction should slow down, warn other traffic, stop in the safest available place and contact the emergency services.
Wikimedia.org • Davi Sanchez • CC BY
How can you avoid driving the wrong way in Uruguay?
Traffic normally keeps right here. Keep to the correct side of the road and use no-entry and one-way signs to identify prohibited approaches; do not enter an exit ramp against its permitted direction.
What signs can prevent wrong-way driving in Uruguay?
Read no-entry signs, one-way signs, lane arrows and temporary directions together; a wide road is not automatically two-way. Before entering a motorway, expressway, one-way street or slip road, check the permitted direction rather than relying only on a navigation app.
What should you do if you enter a road against traffic in Uruguay?
Do not continue along the wrong-way lane or try to reverse or make a U-turn across a high-speed road. Reduce speed, warn other traffic if safe, get to a protected stopping place away from moving traffic when possible and contact the police or road operator for assistance.
9. Traffic lights
Traffic lights use coloured lights, arrows or symbols to regulate when road users may proceed, must prepare to stop or must remain stopped. Separate signals may apply to particular directions, lanes, pedestrians, cyclists or public-transport vehicles.
A green light permits movement only when the route is clear and the movement is otherwise legal. Road users must still follow priority rules, turning restrictions, lane markings and instructions from authorised traffic controllers.
Wikimedia.org • Aleksandrs Timofejev • CC BY
What must a driver do at red, amber and green signals in Uruguay?
Stop on steady red at the marked line or before entering the crossing. On amber, prepare to stop unless already in the crossing or stopping would endanger traffic. Green permits proceeding or turning right; a left turn from a two-way street with signals needs the expressly authorised signage. Do not enter a blocked junction.
🔗 impo.com.uy • Uruguay, Law 18,191, article 36, updated traffic-light rules; 🔗 impo.com.uy • Uruguay, Law 18,191, article 17, updated text
May you turn at a red traffic light in Uruguay?
A steady red light requires a stop. When a green arrow is displayed with red, article 36 allows cautious movement only in the arrow’s direction. Respect the applicable priority rules and check pedestrians and other traffic; an ordinary red indication alone does not permit a turn.
🔗 impo.com.uy • Uruguay, Law 18,191, article 36, updated traffic-light rules; 🔗 impo.com.uy • Uruguay, Law 18,191, article 17, updated text
Can a green light remove the need to give way to pedestrians in Uruguay?
No. A green signal is not a guarantee that the junction is empty. Check for people already crossing, vehicles completing a movement and any separate pedestrian, bicycle or turning signals. Do not enter if you cannot clear the junction safely.
🔗 impo.com.uy • Uruguay, Law 18,191, article 36, updated traffic-light rules; 🔗 impo.com.uy • Uruguay, Law 18,191, article 17, updated text
10. Location marker
A location marker is a roadside reference showing a measured position along a road. It normally identifies a kilometre, mile or smaller interval measured from an established starting point on that route.
Kilometre and hectometre markers help road users, emergency services, road authorities and maintenance crews identify an exact section of road. They do not impose a speed limit, priority rule or access restriction.
Wikimedia.org • Maywiki • CC BY-SA
What does a roadside location marker tell you in Uruguay?
MTOP’s sign manual describes kilometre posts showing the official position along the route, marked with K and the kilometre number. This is a route reference, not automatically the distance to your destination.
How can a location marker help in an emergency in Uruguay?
If you can see a marker safely, give the emergency operator the route number or road name, travel direction and marker reading. Additional landmarks, exits and GPS position can help. Do not leave a safe place or enter traffic to read a post.
Does a location marker set a speed limit or permit stopping in Uruguay?
No. A location marker is for orientation and road management; it does not itself set a speed limit, change priority or permit parking. Follow the actual traffic signs and stop only where the law and safety allow.
11. No parking
No parking indicates that vehicles may not be left parked at the location or along the section of road covered by the restriction. Depending on local law, a driver may still be allowed to stop briefly to pick up or drop off passengers or to load or unload goods, provided stopping itself is not prohibited.
A no-parking restriction may apply continuously or only during specified times, days, vehicle categories or sections of road. Its exact extent and exceptions are determined by the traffic sign, supplementary panels, road markings and local traffic regulations.
Wikimedia.org • Andrés Franchi Ugart • CC BY-SA
What does a no-parking sign mean?
A no-parking sign prohibits leaving a vehicle parked in the area or along the section of road to which the restriction applies. The exact legal definition of parking and the extent of the prohibition vary between countries.
🔗 wegcode.be • Belgian Road Code, articles 2, 23–27 and 70; 🔗 gov.uk • Great Britain, official parking-control signs and road markings
Is no parking the same as no stopping?
No. A no-parking restriction commonly still permits certain brief stops, such as picking up or dropping off passengers or loading or unloading goods. A no-stopping restriction is stricter and generally prohibits voluntary stopping as well as parking.
🔗 wegcode.be • Belgian Road Code, articles 2, 23–27 and 70; 🔗 gov.uk • Great Britain, official parking-control signs and road markings
Can you wait in your vehicle where parking is prohibited?
Remaining inside the vehicle does not necessarily mean that it is not parked. If the vehicle remains stationary beyond what local law permits as a brief stop, it may legally be considered parked even when the driver stays inside.
🔗 wegcode.be • Belgian Road Code, articles 2, 23–27 and 70; 🔗 gesetze-im-internet.de • Germany, StVO, sections 12–13 and 19
12. Reversing
Reversing means driving a vehicle backwards. It is commonly used when parking, leaving a confined space or repositioning a vehicle where forward movement is not practical.
Before reversing, the driver should check mirrors and blind spots, look carefully around the vehicle and make sure the area behind is clear. Reversing should be performed slowly and only for as long as necessary because visibility behind the vehicle is often limited.
Wikimedia.org • Kārlis Dambrāns • CC BY
When may Uruguayan drivers reverse?
Only when strictly justified, taking precautions without disturbing other road users.
🔗 impo.com.uy • National Road Traffic Regulation — 17.2 reversing and 17.5 livestock passage
13. Bus
A bus is a motor vehicle designed to transport multiple passengers, usually along roads as part of public transport, school transport, private transport or another passenger service. Buses generally have more passenger capacity than cars and may be designed to carry seated passengers, standing passengers or both.
Special rules may apply to buses concerning the driving licence, passenger capacity, speed limits, seat belts, bus lanes, stops and passenger boarding. The legal classification of buses and coaches and the rules applying to them vary between countries, so drivers and passengers must follow the local traffic regulations.
Wikimedia.org • Mx. Granger • CC0
What is a bus?
A bus is a motor vehicle designed to transport a relatively large number of passengers. It may be used for public transport, school transport, private services or other passenger transport.
🔗 gov.uk • Great Britain Highway Code, Rules 83–88; national guidance example
🔗 gov.uk • Great Britain Highway Code, Rules 221–223; national guidance example
Do buses always have priority when leaving a bus stop?
No. Some countries require other drivers to give way to buses leaving designated stops, particularly in urban areas, while others apply the normal merging rules.
🔗 gov.uk • Great Britain Highway Code, Rules 83–88; national guidance example
🔗 gov.uk • Great Britain Highway Code, Rules 221–223; national guidance example
Do buses have special speed limits?
They can. Some countries impose lower maximum speeds on buses than on passenger cars, particularly on high-speed roads. Different limits may apply to buses and coaches.
🔗 gov.uk • Great Britain Highway Code, Rules 83–88; national guidance example
🔗 gov.uk • Great Britain Highway Code, Rules 221–223; national guidance example
14. Police
Police are public authorities responsible for enforcing laws, maintaining public safety and managing situations that may affect road traffic. In traffic, police officers may control vehicles, enforce traffic rules, investigate collisions, direct traffic and respond to emergencies.
Road users must follow lawful instructions given by police officers or other authorised traffic-control personnel. Police directions may temporarily override traffic lights, road signs or normal traffic arrangements, depending on local law.
Wikimedia.org • Daniel Segovia Kravies • CC BY-SA
What is the role of police in road traffic?
Police help enforce traffic law, investigate collisions and respond to risks on the road. For example, Greater Manchester Police describe targeted road enforcement, a round-the-clock roads-policing response and specialist serious-collision investigation. Exact responsibilities and powers vary by jurisdiction.
🔗 gmp.police.uk • Greater Manchester Police, Roads Policing Strategy2024–2026
Must you obey a police officer directing traffic?
Yes. Lawful directions given by an authorised police officer must be followed. In many countries, those directions take precedence over traffic lights, road signs and normal priority rules.
What should you do if police signal you to stop?
Slow down, follow the officer's directions and stop at a safe location as instructed. Do not make sudden movements or continue driving unless directed to do so.
15. Ambulance
An ambulance is a vehicle equipped and used to provide emergency medical assistance or transport patients to or between healthcare facilities. Ambulances may carry medical equipment and trained personnel who can provide treatment during transport.
During an emergency response, an ambulance may use warning lights and a siren and may receive special priority or exemptions from certain traffic rules. Other road users must follow the local rules for emergency vehicles, make sufficient space and avoid obstructing their passage.
Wikimedia.org • Ganímedes • CC BY-SA
What is an ambulance?
An ambulance is a specially equipped vehicle used to provide emergency medical assistance and transport sick or injured people.
🔗 gov.uk • Great Britain Highway Code, Rule 219, emergency vehicles; national guidance example
What should you do when an ambulance approaches?
Make space safely for an ambulance on an emergency response, following the local rules and any lawful directions. Slow down or stop where necessary without sudden or dangerous movements. Do not assume that its emergency status allows you to pass a red light or disregard another traffic control.
🔗 gov.uk • Great Britain Highway Code, Rule 219, emergency vehicles; national guidance example
Can an ambulance exceed the speed limit?
Many countries permit emergency vehicles to depart from certain normal speed rules during an urgent mission, subject to safety requirements and national legislation.
🔗 gov.uk • Great Britain Highway Code, Rule 219, emergency vehicles; national guidance example
16. Pothole
A pothole is a hole or depression in the road surface caused by wear, weather, water, repeated traffic loads or deterioration of the pavement. Potholes can vary greatly in size and depth and may develop gradually or become worse after freezing, heavy rain or repeated vehicle traffic.
Potholes can affect steering, braking and vehicle stability and may damage tyres, wheels or suspension components. Drivers and riders should observe the road ahead, adapt their speed and avoid sudden or dangerous manoeuvres when encountering damaged road surfaces.
Wikimedia.org • State Farm • CC BY
What is a pothole?
A pothole is a hole or depression that develops in a road surface when the pavement becomes damaged or deteriorates.
What should you do when you see a pothole?
Reduce speed when necessary, maintain control of the vehicle and avoid abrupt steering or braking. Only move around the pothole when this can be done safely without endangering other road users.
🔗 gov.uk • Great Britain Highway Code, Rules 226–237; national guidance example
Are potholes dangerous for cyclists?
Yes. Bicycle wheels can be strongly affected by deep holes or sharp edges, particularly when the cyclist has little time or space to avoid the hazard.
🔗 gov.uk • Great Britain Highway Code, Rules 226–237; national guidance example
17. Path
A path is a relatively narrow route intended for pedestrians and, where permitted, other road users or small vehicles. Paths may run through urban areas, countryside, parks, forests or between other roads and can be surfaced or unsurfaced.
A path is not necessarily the same as a footpath or cycle path. The road users permitted to use it depend on its legal status, width, traffic signs and local regulations.
Wikimedia.org • Tangopaso • CC0
Is a path the same as a footpath?
Not necessarily. A footpath is specifically intended for pedestrians, while a path may also permit cyclists or other users according to local rules.
Can cyclists use a path?
This depends on the legal status, width and signs applying to the path. Some paths permit cyclists, while others are reserved for pedestrians or particular users.
Can motor vehicles use a path?
This depends on local law. Some paths prohibit motor vehicles entirely, while narrow vehicles may be permitted on other paths unless traffic signs restrict access.
Who has priority when a path joins a larger road?
The applicable local priority rules determine who must give way. Special rules often apply when a minor path joins an ordinary road.
18. Particulates
Particulates, or particulate matter (PM), are tiny solid particles or liquid droplets suspended in the air. In road traffic, particulate emissions can come from vehicle exhaust, brake wear, tyre wear and road-surface wear, as well as dust that is disturbed by passing traffic.
Particulate matter is commonly classified by particle size. PM10 refers to particles with a diameter of up to approximately 10 micrometres, while PM2.5 refers to finer particles of up to approximately 2.5 micrometres. Vehicle emission standards, particulate filters and air-quality measures are used to reduce exposure to these pollutants.
Wikimedia.org • wili hybrid • CC BY
What are particulates?
Particulates, or particulate matter, are very small solid particles or liquid droplets suspended in the air.
🔗 epa.gov • US EPA, Particulate Matter Basics
🔗 fhwa.dot.gov • US FHWA, particulate matter and road-transport sources
🔗 epa.gov • US EPA, AP-42 section 13.2.1.1, paved-road emissions and dust resuspension
What are PM10 and PM2.5?
PM10 refers to particles with a diameter of up to approximately 10 micrometres. PM2.5 refers to finer particles with a diameter of up to approximately 2.5 micrometres.
🔗 epa.gov • US EPA, Particulate Matter Basics
🔗 fhwa.dot.gov • US FHWA, particulate matter and road-transport sources
🔗 epa.gov • US EPA, AP-42 section 13.2.1.1, paved-road emissions and dust resuspension
Where do traffic particulates come from?
Road traffic can produce particles through engine exhaust, brake wear, tyre wear and road-surface wear. Passing traffic can also resuspend dust already present on the road.
🔗 epa.gov • US EPA, Particulate Matter Basics
🔗 fhwa.dot.gov • US FHWA, particulate matter and road-transport sources
🔗 epa.gov • US EPA, AP-42 section 13.2.1.1, paved-road emissions and dust resuspension
19. Air pollution
Air pollution is the presence of gases, particles or other substances in the air at concentrations that can harm human health, the environment or ecosystems. Road traffic contributes to air pollution through exhaust emissions and through non-exhaust sources such as brake wear, tyre wear and road dust.
Important traffic-related pollutants include nitrogen oxides, particulate matter, carbon monoxide and volatile organic compounds. Some pollutants are emitted directly by vehicles, while others can form in the atmosphere through chemical reactions. Vehicle-emission standards, cleaner technologies and traffic-management measures are used to reduce these emissions.
Wikimedia.org • Emmanuelkwizera • CC BY-SA
What is air pollution?
Air pollution is the presence of harmful gases, particles or other contaminants in the air. Road transport can contribute through engine emissions, vehicle wear and dust; the sources and pollutants differ by vehicle and conditions.
🔗 epa.gov • US EPA, smog and vehicle emissions
🔗 epa.gov • US EPA, Particulate Matter Basics
🔗 fhwa.dot.gov • US FHWA, particulate matter and road-transport sources
🔗 epa.gov • US EPA, AP-42 section 13.2.1.1, paved-road emissions and dust resuspension
How does road traffic cause air pollution?
Vehicles with combustion engines can emit exhaust pollutants. Road traffic also produces particles through brake, tyre and road-surface wear and can stir up road dust. Vehicles without tailpipe emissions can still contribute to these non-exhaust sources.
🔗 epa.gov • US EPA, smog and vehicle emissions
🔗 epa.gov • US EPA, Particulate Matter Basics
🔗 fhwa.dot.gov • US FHWA, particulate matter and road-transport sources
🔗 epa.gov • US EPA, AP-42 section 13.2.1.1, paved-road emissions and dust resuspension
Which air pollutants are associated with road traffic?
Important traffic-related pollutants include nitrogen oxides, particulate matter, carbon monoxide and volatile organic compounds. Their relative importance depends on the vehicle, fuel and driving conditions.
🔗 epa.gov • US EPA, smog and vehicle emissions
🔗 epa.gov • US EPA, Particulate Matter Basics
🔗 fhwa.dot.gov • US FHWA, particulate matter and road-transport sources
🔗 epa.gov • US EPA, AP-42 section 13.2.1.1, paved-road emissions and dust resuspension
20. Rush hour
Rush hour is a period when roads and public transport networks experience particularly high demand, commonly because large numbers of people are travelling to or from work, school or other regular destinations. It usually occurs during the morning and late afternoon or evening on working days.
Rush-hour traffic can result in congestion, slower speeds, longer journeys and frequent stopping. Drivers should maintain a safe following distance, remain patient, anticipate changing traffic conditions and follow any temporary or dynamic traffic-management measures.
Wikimedia.org • MDRX • CC BY-SA
What is rush hour?
Rush hour is a period when unusually large numbers of people travel at the same time, resulting in increased traffic and often congestion.
🔗 gov.uk • Great Britain Highway Code, Rules 126 and 133–134; national guidance example
🔗 gov.uk • Great Britain Highway Code, Rules 174 and 192; national guidance example
Should you increase your following distance in rush-hour traffic?
Yes. Leave sufficient distance to react to sudden braking and frequent changes in traffic speed. Avoid following another vehicle too closely even when traffic is moving slowly.
🔗 gov.uk • Great Britain Highway Code, Rules 126 and 133–134; national guidance example
🔗 gov.uk • Great Britain Highway Code, Rules 174 and 192; national guidance example
Can speed limits change during rush hour?
Yes. Roads equipped with variable traffic management may display lower speed limits during congestion. Drivers must follow the speed limit currently indicated.
🔗 gov.uk • Great Britain Highway Code, Rules 126 and 133–134; national guidance example
🔗 gov.uk • Great Britain Highway Code, Rules 174 and 192; national guidance example
21. Road code
A road code is a collection of laws and traffic rules that regulate how people use public roads. It establishes rules for drivers, cyclists, pedestrians and other road users and covers subjects such as priority, speed, overtaking, parking, traffic lights, road signs and road markings.
Road codes differ between countries and sometimes between regions. Every road user is expected to know and follow the rules that apply where they are travelling, even when those rules differ from those in their home country.
Are road codes the same in every country?
No. Although many traffic rules and signs are similar internationally, each country establishes its own traffic legislation and may apply different rules, signs, speed limits and requirements.
22. Street gutter
A street gutter is a narrow channel along the edge of a road or street that collects and carries rainwater toward drains or other drainage systems. It is commonly located between the carriageway and the kerb and may be formed from concrete, paving stones or part of the road surface.
A street gutter is primarily a drainage feature rather than a traffic lane. Road users should take care near gutters because they may contain water, debris, drain openings or uneven surfaces.
Wikimedia.org • Airman 1st Class Alystria Maurer • CC0
Why should cyclists take care near street gutters?
Gutters may contain water, leaves, debris, drain covers or uneven surfaces, which can reduce grip or make cycling less stable.
🔗 gov.uk • Great Britain Highway Code, Rules 226–237; national guidance example
23. Cargo bike
A cargo bike is a bicycle designed to transport goods, children or other larger loads than can normally be carried on a conventional bicycle. Cargo bikes may use a box or platform in front of or behind the rider, an extended rear carrier or a multi-wheel design.
Cargo bikes can be powered entirely by the rider or equipped with electric pedal assistance. Their permitted dimensions, passenger capacity, use of cycle paths and electrical-assistance limits depend on the local traffic and vehicle regulations.
Wikimedia.org • Clément Bucco-Lechat • CC BY-SA
What is a cargo bike?
A cargo bike is a bicycle designed to carry goods, children or larger loads than a conventional bicycle.
🔗 nsw.gov.au • NSW Government, bicycle safety equipment; NSW helmet rule
🔗 service-public.gouv.fr • French Service Public, mandatory bicycle equipment; child helmet example
Can a cargo bike carry children?
Yes, when it is designed and equipped for passenger transport. Children should use the seats, restraints, foot protection or other safety equipment provided by the manufacturer and required by local law.
🔗 nsw.gov.au • NSW Government, bicycle safety equipment; NSW helmet rule
🔗 service-public.gouv.fr • French Service Public, mandatory bicycle equipment; child helmet example
Is a helmet compulsory on a cargo bike?
This depends on the country's bicycle rules and the vehicle's classification. A model legally classified as a faster motorised vehicle may have different helmet requirements from an ordinary cargo bicycle.
🔗 nsw.gov.au • NSW Government, bicycle safety equipment; NSW helmet rule
🔗 service-public.gouv.fr • French Service Public, mandatory bicycle equipment; child helmet example
24. Forestry vehicle
A forestry vehicle is a vehicle designed, equipped or adapted for work connected with forestry and woodland management. It may be used to pull machinery, transport timber, carry equipment or perform operations such as harvesting, forwarding or maintaining forest land.
Forestry vehicles can include tractors, specialised self-propelled machines, trailers and interchangeable equipment. Their registration, driving-licence requirements, maximum speed, road access and technical requirements depend on the vehicle's legal classification and the local traffic regulations.
Wikimedia.org • Antti Leppänen • CC BY-SA
What is a forestry vehicle?
A forestry vehicle is a vehicle designed or adapted for forestry work, such as pulling machinery, carrying equipment, transporting timber or working on forest land.
Do forestry vehicles have special speed limits?
They may. The permitted speed can depend on the vehicle's construction speed, mass, road type and local traffic rules. Posted speed limits must also be respected.
Can forestry equipment extend beyond the normal width of the vehicle?
Yes. Machinery and attached implements can make a forestry vehicle unusually wide or long. Check the applicable dimensions and special-vehicle rules before using the road. British guidance, for example, includes attached implements in width checks and describes extra arrangements for wide agricultural or forestry vehicles.
🔗 gov.uk • DfT, tractors and tracked vehicles on public roads
25. Construction vehicle
A construction vehicle is a vehicle or mobile machine designed or adapted for work connected with construction, roadworks, excavation, lifting or the movement of materials. Examples include excavators, loaders, bulldozers, road rollers, mobile cranes, dump trucks and concrete mixers.
Construction vehicles vary greatly in size, speed and legal classification. Some are ordinary road vehicles, while others are specialised machines intended mainly for use on construction sites. When travelling on public roads, they must comply with the applicable registration, licensing, lighting, dimensions, weight, speed and traffic rules.
Wikimedia.org • Sunridin • CC BY
What is a construction vehicle?
A construction vehicle is a vehicle or mobile machine used for construction, excavation, lifting, roadworks or transporting construction materials.
Do construction vehicles have special speed limits?
They may. The permitted speed can depend on the vehicle’s design, mass, legal category and the road. Do not assume that a construction machine has the same limit as a car; follow both the road limit and any lower vehicle-specific limit.
What should you do when passing a construction vehicle?
Reduce speed where necessary and leave sufficient space. Be aware of blind spots, projecting equipment, wide turns and workers who may be present nearby.