Speed limits are implemented to not only reduce accidents but to keep traffic moving smoothly.
The general speed limits for cars and motorcyclists are:
30mph in a build-up area with street lighting
60mph on a single carriageway
70mph on a dual carriage way or motorway
However, the speed limit is not the same for all vehicles, cars towing trailers or caravans, buses, coaches and good vehicles all have varying speed limits to abide by.
You will find in some instances that the speed limit is temporarily changed. Take for example on a motorway, generally if there has been an accident, the speed limit can be reduced to 40 or 50mph.
Surprisingly there are not only maximum speed limits but occasionally you will find minimum speed limits as well. Driving to slowly can be just as dangerous as driving too fast. By holding other drivers up you may encourage them to overtake dangerously or cause tailbacks affecting thousands of motorists.
When acknowledging speed limits, it is also important to take in to consideration the road conditions and weather conditions. Driving down a country lane with a speed limit of 60mph is not appropriate if it is icy of raining heavily.
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