UN R41 Motorcycle Noise | UN Regulation | UNR 0041 |
UN R51 Vehicle Noise Emissions | UN Regulation | UNR 0051 |
UN R59 Replacement Silencing Systems | UN Regulation | UNR 0059 |
UN R117 Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance | UN Regulation | UNR 0117 |
Quiet Road Transport Vehicles | Regulatory Project | QRTV-GTR |
Intelligent Transport Systems | ITS | |
RE3 Construction of Vehicles | RE3 | |
Environmentally Friendly Vehicles | EFV |