M40 motorway

The M40motorway links London, Oxford, and Birmingham in England, a distance of about 89 miles (143 km).

The motorway is dual three lanes except for junction 1A to junction 3 (which is dual four lanes) a short section in-between the exit and entry slip-roads at junction 4 (which is two lanes in both directions) and also between the slip-roads at junction 9 (in the south-eastbound direction only).

An Active Traffic Management system operates on the short section north-westbound from junction 16 (A3400) to the M42.