Smart motorways have become a prominent feature of the UK's road network, offering increased capacity and improved traffic flow ...

A 60mph speed limit experiment on the M1 and M6 is being shelved after air quality improved - despite no reported change in drivers' average speeds. The motorways, two of the UK's busiest ...

The M1 in Northamptonshire is one of the routes ... which included the hard shoulder being converted into a live running lane, and variable speed limits. Smart motorways without a hard shoulder ...