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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 .
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 ...
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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 ...
Because of this, heavy vehicles often use disproportionately weak brakes on steered wheels, which hurts the stopping distance and causes brakes on non-steered wheels to work harder, worsening fade. An advantage of low-fade brakes such as disc brakes is steered wheels can do more braking without causing brake steer. [4]
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This is a list of the extreme points of the United Kingdom: the points that are farther north, south, east or west than any other location.Traditionally the extent of the island of Great Britain has stretched "from Land's End to John o' Groats" (that is, from the extreme southwest of mainland England to the far northeast of mainland Scotland).