speed and stopping distances speed we measure speed in miles per hour mph 1 mile ≈ 1,600m or 1.6km...
Post on 18-Dec-2015
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Speed and Stopping Distances
Speed• We measure speed in miles per hour• mph• 1 mile ≈ 1,600m or 1.6km • 1 mph ≈ 1.6kph
How fast do these things normally
travel?
Hit by a
vehicle at...
Hit by a
vehicle at...
9 in 10 chance
of being killed
1 in 5 chance
of being killed
1 in 40 chance
of being killed
Hit by a
vehicle at...
9 in 10 chance
of being killed
1 in 5 chance
of being killed
1 in 40 chance
of being killed
Hit by a
vehicle at...
9 in 10 chance
of being killed
1 in 5 chance
of being killed
1 in 40 chance
of being killed
Child
runs
out
Driver
sees
child
Driver
thinks
‘stop’
Foot on
brakes
Brakes
work
Car
stops
Stopping distance is...
Stopping distance is...
• The distance a vehicle travels from the time the driver decides to stop until the vehicle actually stops moving.
Child
runs
out
Driver
sees
child
Driver
thinks
‘stop’
Foot on
brakes
Brakes
work
Car
stops
Thinking distance Braking distance
Stopping distance is...
Stopping distances...
20mph
3 car lengths – 12m
40mph
9 car lengths – 36m
50mph
13 car lengths – 53m
60mph 18 car lengths – 73m
70mph 24 car lengths – 96m
30mph
6 car lengths – 23m
Don’t take risks....
...remember cars need time to stop!
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