Support us

Air pollutionWallonia

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

For informational purposes only. Always follow official regulations. Some content and images were created with AI assistance.

Traffic signs
Traffic rules
Wallonia

79. 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.

Air pollution
Black smoke emitted from a vehicle exhaust on a road in Kamonyi District. (Rwanda)
Wikimedia.org • Emmanuelkwizera • CC BY-SA
Is road traffic an important source of air pollution in Belgium?

Yes. Road traffic contributes to several air pollutants, particularly nitrogen oxides and particulate matter, and its influence can be especially important near busy roads and in densely populated areas.

🔗 vmm.vlaanderen.be • Flemish Environment Agency — traffic emissions and measures to reduce them; no unsupported concentration figure added

Which traffic-related pollutant is especially important near Belgian roads?

Nitrogen dioxide (NO2) is strongly associated with road traffic. The highest concentrations in Flanders are particularly linked to heavily trafficked roads.

🔗 vmm.vlaanderen.be • Flemish Environment Agency — traffic emissions and measures to reduce them; no unsupported concentration figure added

How can drivers help reduce traffic-related air pollution?

Drivers can reduce unnecessary emissions by maintaining their vehicle correctly, avoiding unnecessary idling, driving smoothly and using lower-emission transport alternatives where practical. Public transport, cycling and walking can also reduce the amount of motor traffic contributing to urban air pollution.

🔗 vmm.vlaanderen.be • Flemish Environment Agency — traffic emissions and measures to reduce them; no unsupported concentration figure added

1 Wallonia 2 Motorway 3 Expressway 4 Residential area 5 Built-up area 6 Zone 7 Speed limit 8 Bike path 9 Cycling street 10 Pedestrian zone 11 Speed bump 12 Customs 13 One-way traffic 14 Quay 15 Slope 16 Bus lane 17 Dead end 18 Stop sign 19 Give way 20 Roundabout 21 Priority road 22 Road narrowing 23 Priority over oncoming traffic 24 Give way to oncoming traffic 25 Pedestrian crossing 26 Railway crossing 27 Mandatory direction 28 Turn prohibition 29 School area 30 Crossing animals 31 Rockfall 32 Curve 33 Chevron 34 Wrong-way driving 35 Roadworks 36 Height limit 37 Width limit 38 Weight limit 39 Radar speed sign 40 Selective barriers 41 Intersection direction sign 42 Priority at the next junction 43 Traffic lights 44 Pedestrian lights 45 Driving licence 46 Location marker 47 Traffic mirror 48 International border 49 Cycling route 50 Parking 51 No parking 52 Kiss and ride 53 Parking meter 54 Traffic management 55 Reversing 56 Uncontrolled crossroad 57 Road surface 58 Ring road 59 Cycle highway 60 Licence plate 61 Charging station 62 Dangers 63 Turn on red 64 Identity card 65 Fire risk 66 Pedestrian 67 Moped 68 Car 69 Truck 70 Bus 71 Police 72 Ambulance 73 Tram lights 74 European emission standard 75 Pothole 76 Public square 77 Path 78 Particulates 79 Air pollution 80 Rush hour 81 Road code 82 Street gutter 83 Cargo bike 84 Forestry vehicle 85 Construction vehicle 86 Semi-trailer truck 87 Trolleybus 88 Speed pedelec 89 Delivery vehicle 90 Idling 91 Tow truck 92 Four-wheel drive 93 No vehicles 94 Bicycle 95 Motorcycle equipment 96 Railcar 97 Rail track 98 Public transport 99 Caravan 100 Trailer ...