Breaking Power/Stopping Distances

Average Dry Stopping Distance (Assuming two-thirds of a second reaction time)

Speed	Thinking Distance	Braking Distance	Total Stopping Distance
20 mph	20 feet	20 feet	40 feet
30 mph	30 feet	45 feet	75 feet
40 mph	40 feet	80 feet	120 feet
50 mph	50 feet	125 feet	175 feet
60 mph	60 feet	180 feet	240 feet
70 mph	70 feet	245 feet	315 feet
80 mph	80 feet	320 feet	400 feet

Average Wet Stopping Distance (Assuming two-thirds of a second reaction time)

Speed	Thinking Distance	Braking Distance	Total Stopping Distance
20 mph	20 feet	40 feet	60 feet
30 mph	30 feet	90 feet	120 feet
40 mph	40 feet	160 feet	200 feet
50 mph	50 feet	250 feet	300 feet
60 mph	60 feet	360 feet	420 feet
70 mph	70 feet	490 feet	560 feet
80 mph	80 feet	640 feet	720 feet

Traffic Signals-Universal Color Code

A traffic light, traffic signal or a stop light is a signaling device positioned at a road intersection to indicate when it is safe to wade through. The traffic signal passes on its information using a universal color code .

Traffic signs or road signs are signs erected at the side of roads to provide information to road users. With increasing speed of transport, the tendency is for countries to adopt pictorial signs or otherwise simplify and standardize signs, to facilitate international travel where language differences can create barriers and in general to reduce the risks in driving. Such pictorial signs use symbols in place of words and are usually a result of international standards.