All speeds stated are national speed limits in miles per hour (MPH) and apply to all roads unless signs show otherwise.
The 30 mph limit applies to all traffic on roads in England and Wales (only Class C and unclassified roads in Scotland) with street lighting unless signs show otherwise)
Built up areas generally have roads with street lights. Unless signed otherwise, the speed limit is always 30mph, no matter the number of lanes.
Single carriageway is an undivided road with no central reservation.
Dual carriageway is a two way divided road with a central reserve/division that you are able to cross from side roads.
Motorway is a two way divided road with a central barrier containing slip roads. It is only possible to access a motorway via slip roads and there is no crossway traffic.
* 60 if articulated or towing trailer