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 below, or shall be capable of being decelerated at a sustained rate corresponding to these distances:
Feet to stop from 20 miles per hour | Deceleration in feet per second per second | |
Vehicles or combination of vehicles having brakes on all wheels | 30 | 14 |
Vehicles or combinations of vehicles not having brakes on all wheels | 40 | 10.7 |
R.I. Gen. Laws § 31-23-5