Controlling the vehicle; taking into account: proper use of safety belts, rear-view mirrors, head restraints; seat; proper use of lights and other equipment; proper use of clutch, gearbox, accelerator, braking systems (including third braking system, if available), steering; controlling the vehicle under different circumstances, at different speeds; steadiness on the road; the weight and dimensions and characteristics of the vehicle; the weight and type of load (categories BE, C, CE, C1, C1E, DE, D1E only); the comfort of the passengers (categories D, DE, D1, D1E only) (no fast acceleration, smoothly driving and no hard braking) ...[+++].

Driving economically and in an environmentally friendly way, taking into account the revolutions per minute, changing gears, braking and accelerating (categories BE, C, CE, C1, C1E, D, DE, D1, D1E only).

2.1.3.Pneumatic connections between motor vehicles and trailers 2.1.3.1.In the case of a braking device operated by compressed air, the pneumatic link with the trailer must be of the type with two or more lines.

In the case of a braking device operated by compressed air, the pneumatic link with the trailer must be of the type with two or more pipes.

Laden vehicles shall be tested in such a manner that the energy input is equivalent to that recorded in the same period of time with a laden vehicle driven at an average speed of 30 km/h on a 7 % down gradient for a distance of 6 km. During the test, the service, secondary and parking braking devices must not be engaged.

ANNEX III METHOD OF MEASURING THE REACTION TIME FOR VEHICLES FITTED WITH COMPRESSED AIR BRAKING DEVICES WITH DOUBLE PIPES