Driver Perceived Noise - Agricultural Tractors - Reference EC Directive 2006/26/EC.

Highway Code Regulations - Regulamento do Codigo da Estrada (Extracts).

Technical Requirements for Road Vehicles - RNTR-2.

Type-approval of Road Vehicles (RNTR-2).

Exhaust and Noise Emissions from Motor Vehicles (Regulation 6).

Vehicle Construction and Use.

Category M1 Vehicles.

Category M2 and M3 Motor Vehicles.

Category N1 Vehicles.

Category N2 and N3 Motor Vehicles.