Sign frames which hold the traffic signs could cost around £40 to £80 each and the signs themselves could be anything up to ...

All-lane-running (ALR) smart motorways make up around 13 per cent of England's motorway network in a bid to reduce congestion ...

Smart motorways use technology to regulate traffic flow with overhead signs telling motorists speed limits and which lanes are closed. Some use the hard shoulder as an extra lane of traffic ...