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Braking distance refers to the distance a vehicle will travel from the point when its brakes are fully applied to when it comes to a complete stop. It is primarily affected by the original speed of the vehicle and the coefficient of friction between the tires and the road surface, [Note 1] and negligibly by the tires' rolling resistance and vehicle's air drag.
A non-primary road sign near Bristol shows Guildford Rules patches.Road signs in the United Kingdom and in its associated Crown dependencies and overseas territories conform broadly to European design norms, with a number of exceptions: direction signs omit European route numbers, and road signs generally use the imperial system of units (miles and yards), unlike the rest of Europe (kilometres ...
For heavy duty commercial vehicles it is recommended 4-6 seconds following distance for speeds under 30 mi/h (48 km/h), and 6-8 seconds following distance for speeds over 30 mi/h (48 km/h). [9] Rear-end collisions are the number one type of traffic collisions .
d MT = braking distance, m (ft) V = design speed, km/h (mph) a = deceleration rate, m/s 2 (ft/s 2) Actual braking distances are affected by the vehicle type and condition, the incline of the road, the available traction, and numerous other factors. A deceleration rate of 3.4 m/s 2 (11.2 ft/s 2) is used to determine stopping sight distance. [6]
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Numbered roads in the UK are signed as M (Motorway), A, [12] or B [12] roads (legal "classification" varies between countries), as well as various categories of more minor roads: for internal purposes, local authorities may also use C, [13] D [citation needed] and U [13] (the letter standing for "Unclassified"); use of C and U numbers on signs is unusual but examples can be found in all four ...
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Causing death by dangerous driving; Dangerous driving; Careless driving/Driving without due care and attention; Motor vehicle document offences: see English criminal law#Forgery, personation and cheating. And see Drink driving (United Kingdom)