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Car Stopping Distance - Thinking Distance - Breaking Distance
Tip
When trying to visualise a distance it is useful to remember that the length of an average car is approximately 15ft, therefore, 75ft would be about 5 car lengths away.
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Another way of judging distances has been sent in by Frederick Petersen - this uses a time factor.
Pick a fixture on the side of the road (such as a bridge or telephone box) and allow a gap of 2 seconds between you and the rear of the car in front. This is attained by saying in your mind 1001, take a breath then 1002. Should the weather be wet then it is advised that an extra second would make a major accident less likely.
I must admit I have heard this before but have found when trying to carry it out that cars keep popping in the gap in front and you seem to be going backwards.
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SPEED
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THINKING DISTANCE
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BREAKING DISTANCE
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OVERALL STOPPING DISTANCE
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20 mph
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20 ft. (6m)
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20 ft. (6m)
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40 ft. (12m)
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30 mph
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30 ft. (9m)
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45 ft. (14m)
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75 ft. (23m)
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40 mph
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40 ft. (12m)
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80 ft. (24m)
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120ft. (36m)
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50 mph
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50 ft. (15m)
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125 ft. (38m)
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175 ft. (53m)
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60 mph
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60 ft. (18m)
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180 ft. (55m)
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240 ft. (73m)
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70 mph
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70 ft. (21m)
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245 ft. (75m)
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315 ft. (96m)
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Speed Conversion
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MILES PER HOUR
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<< >>
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KILOMETRES PER HOUR (APPROX)
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MILES PER HOUR
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<< >>
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KILOMETRES PER HOUR (APPROX)
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10
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=
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16
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80
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=
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128
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20
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=
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32
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90
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=
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144
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30
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=
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48
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100
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=
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160
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40
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=
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64
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110
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=
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176
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50
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=
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80
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120
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=
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193
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60
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=
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96
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130
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=
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209
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70
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=
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112
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140
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=
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225
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