Single carriageway
From Wikipedia, the free encyclopedia
Single carriageway is the British designation for the most common type of road; one with no physical separation (central reservation) between opposing flows of traffic.
It usually has two or more marked traffic lanes, one in each direction, although narrow rural roads and residential streets may have no markings. A one-way street is, by definition, also a single-carriageway.
A road with no central reservation is a single carriageway regardless of the number of lanes of traffic in each direction.
Until 2006, the UK had one single carriageway motorway, the A6144(M). However, in 2006 it lost its motorway status.
[edit] Speed Limits
The national speed limit applies on single carriageways (unless it is in a 'built up area', or a lower limit is posted), which is as follows:
| Type of vehicle | Speed limit |
|---|---|
| Car up to 2 tonnes/motorcycle | 60 mph |
| Car with caravan or trailer | 50 mph |
| Bus or coach up to 12 m long | 50 mph |
| Goods vehicle up to 7.5 t | 50 mph |
| Goods vehicle over 7.5 t | 40 mph |
Note: 60 mph ≈ 95 km/h, 50 mph ≈ 80 km/h, 40 mph ≈ 65 km/h
