| UN R9 Three-Wheeled Cycle Noise | UN Regulation | UNR 0009 |
| UN R28 Audible Warning Devices and Signals | UN Regulation | UNR 0028 |
| UN R41 Motorcycle Noise | UN Regulation | UNR 0041 |
| UN R51 Vehicle Noise Emissions | UN Regulation | UNR 0051 |
| UN R63 Two-wheeled Moped Noise | UN Regulation | UNR 0063 |
| UN R117 Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance | UN Regulation | UNR 0117 |
| RE3 Construction of Vehicles | RE3 | |
| UN R138 Quiet Road Transport Vehicles | UN Regulation | UNR 0138 |
| UN R165 Audible Reversing Warning Systems | UN Regulation | UNR 0165 |
| Road Surface Labeling Recommendations | Road Surface Labeling |