Document ID: chunk:federal_register_of_legislation:F2018L01515:body:0:p23
Version: federal_register_of_legislation:F2018L01515
Segment Type: other
Provision Reference: 
Character Range: 61947–65704

wipers, engine management and braking systems.
6.2. Provisions for motor vehicles
6.2.1. It shall be possible to leave a curve with a radius of 50 m at a tangent without unusual vibration in the steering equipment at the following speed:
 Category M1 vehicles: 50 km/h;
 Category M2, M3, N1, N2 and N3 vehicles: 40 km/h or the maximum design speed if this is below the speeds given above.
6.2.2. When the vehicle is driven in a circle with its steered wheels at approximately half lock and a constant speed of at least 10 km/h, the turning circle shall remain the same or become larger if the steering control is released.
6.2.3. During the measurement of control effort, forces with a duration of less than 0.2 seconds shall not be taken into account.
6.2.4. The measurement of steering efforts on motor vehicles with intact steering equipment.
6.2.4.1. The vehicle shall be driven from straight ahead into a spiral at a speed of 10 km/h. The steering wheel control effort shall be measured at the nominal radius of the steering control until the position of the steering control corresponds to turning radius given in the table below for the particular category of vehicle with intact steering. One steering movement shall be made to the right and one to the left.
6.2.4.2. The maximum permitted steering time and the maximum permitted steering control effort with intact steering equipment are given in the table below for each category of vehicle.
6.2.5. The measurement of steering efforts on motor vehicles with a failure in the steering equipment.
6.2.5.1. The test described in paragraph 6.2.4. shall be repeated with a failure in the steering equipment. The steering effort shall be measured until the position of the steering control corresponds to the turning radius given in the table below for the particular category of vehicle with a failure in the steering equipment.
6.2.5.2. The maximum permitted steering time and the maximum permitted steering control effort with a failure in the steering equipment are given in the table below for each category of vehicle.

Table 2
Steering control effort requirements
Vehicle                                                                                    INTACT   WITH A FAILURE
Category
                                                                                           Maximum  Time(s)         Turning  Maximum  Time(s)  Turning
                                                                                           effort                   radius   Effort            Radius
                                                                                           (daN)                    (m)      (daN)             (m)
M1                                                                                         15       4               12       30       4        20
M2                                                                                         15       4               12       30       4        20
M3                                                                                         20       4               12 **    45 *     6        20
N1                                                                                         20       4               12       30       4        20
N2                                                                                         25       4               12       40       4        20
N3                                                                                         20       4               12 **    45 *     6        20
*    50 for rigid vehicles with 2 or more steered axles excluding self tracking equipment
**  or full lock if 12 m radius is not attainable.

6.3. Provisions for trailers
6.3.1. The