1. Environmental and regulatory context

International road vehicle categories :

• L (L1 to L7): two- or three-wheeled motor vehicles and motor quadricycles.

• M1: passenger transport vehicles with fewer than nine seats.

• M2: passenger transport vehicles with more than nine seats and a maximum mass ≤ 5 tonnes.

• M3: passenger transport vehicles with more than nine seats and a maximum mass > 5 tonnes.

• N1: passenger and goods vehicles with a maximum mass ≤ 3.5 tonnes.

• N2: goods vehicles with a maximum mass > 3.5 tonnes and ≤ 12 tonnes.

• N3: goods vehicles with a maximum mass > 12 tonnes.