Every motor vehicle or combination of motor drawn vehicles shall be capable at all times and under all conditions of loading of being stopped on a dry, smooth, level road free from loose material, upon application of the service (foot) brake within the distances specified in this Code section or shall be capable of being decelerated at a sustained rate corresponding to these distances.

Feet to Stop From 20 Miles Deceleration in __Per_Hour___ Feet_Per_Second

Vehicles or combinations of vehicles having brakes on all wheels 30 14

Vehicles or combinations of vehicles not having brakes on all wheels 40 10.7