Division 3.1.2 Secondary braking system
United Kingdom
The secondary braking system, even if the control device which actuates it is also used for other braking functions, shall give a stopping distance not exceeding the following values and a mean fully developed deceleration not less than the following values:
| Tractors with vmax ≤ 30 km/h: | 0,15 v + (v2/39) |
| (the second term corresponds to a mean fully developed deceleration dm = 1,5 m/s2) | |
| Tractors with vmax > 30 km/h: | 0,15 v + (v2/57) |
| (the second term corresponds to a mean fully developed deceleration dm = 2,2 m/s2) | |
The prescribed performance shall be obtained by applying to the control device a force not exceeding 600 N on a foot or 400 N on a hand operated control device. The control device shall be so placed that it can be easily and quickly applied by the driver.