Air pollutionRomania

An introduction to the traffic rules and road signs of Romania. Learn about driving, road safety and much more in our illustrated book, with answers to frequently asked questions.

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Romania

27. 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.

Black smoke emitted from a vehicle exhaust on a road in Kamonyi District. (Rwanda)
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

Particulates

Rush hour

1 Romania 2 Motorway 3 Built-up area 4 Speed limit 5 Stop sign 6 Priority road 7 Railway crossing 8 School area 9 Slippery road 10 Roadworks 11 Radar speed sign 12 Traffic lights 13 Driving licence 14 International border 15 No stopping 16 Traffic management 17 Reversing 18 Road surface 19 Licence plate 20 Bus 21 Police 22 Ambulance 23 European emission standard 24 Pothole 25 Path 26 Particulates 27 Air pollution 28 Rush hour 29 Road code 30 Street gutter 31 Cargo bike 32 Forestry vehicle 33 Construction vehicle 34 Semi-trailer truck 35 Trolleybus 36 Speed pedelec 37 Delivery vehicle 38 Idling 39 Tow truck 40 Four-wheel drive 41 Bicycle 42 Motorcycle equipment 43 Rail track 44 Caravan 45 Trailer 46 Tow hitch 47 Fire truck 48 Siren 49 Convoy 50 Emergency vehicle lighting 51 Agricultural machinery 52 Electric bicycle 53 Electric vehicle 54 Pedelec 55 Quadricycle 56 Microcar 57 All-terrain vehicle 58 Van 59 Recreational vehicle 60 Scooter 61 Trikke 62 Personal mobility device 63 Skateboard 64 Segway 65 Kick scooter 66 Roller skates 67 Mailman 68 Hitchhiker 69 Toddler 70 Child 71 Disability 72 Motorail 73 km/h 74 mph 75 Speedometer 76 Ride height 77 Dirt road 78 Driving 79 Start-stop system 80 Manual transmission 81 Automatic transmission 82 Throttle 83 Tachometer 84 Steering wheel 85 Power steering 86 Visual scanning 87 Mirror 88 Fuel 89 Fuel gauge 90 Petrol 91 Diesel 92 Diesel exhaust fluid 93 Car insurance 94 First aid kit 95 Fire extinguisher 96 High-visibility clothing 97 First aid 98 Concrete step barrier 99 Barriers 100 Vehicle lights ...