The M40 is running normally in both directions.
The M40 is running normally. Nothing is reported in the National Highways feed right now.
Updated at 07:22 · refreshes every 5 min
No. Nothing unplanned is reported on the M40 right now: no collisions, breakdowns or obstructions in the National Highways feed. Nothing unplanned has been reported and cleared on the M40 since midnight either.
M40 accidents →The M40 stays open tonight, but 9 lane or slip road closures are planned, so expect narrower lanes or a shut slip at those junctions.
M40 closures tonight →The M40 stays open this weekend, but 1 lane or slip road closure is planned, so expect narrower lanes or a shut slip at that junction.
M40 closures this weekend →No closures, collisions or restrictions in the feed right now. Planned works for the days ahead are below.
M40 southbound between J12 and J11
M40 southbound within J4
M40 southbound between J5 and J4
M40 southbound between J11 and J10
M40 southbound between J5 and J4
M40 southbound between J11 and J10
Powered by National Highways’ Transport Data Feeds
The M40 is busiest around 17:00, and at the sensors along this route it keeps moving: even in that hour traffic averages 52 mph.
Typical weekday pattern from 5 National Highways roadside sensors along the route, June 2026. Bar height is traffic volume, colour is average speed. Overnight hours carry too little traffic to judge, so they are shown as quiet.
Junction data © OpenStreetMap contributors
The M40 is the quieter of the two London to Birmingham motorways, climbing through the Chilterns at Stokenchurch and joining the M42 south of Solihull. It takes the strain whenever the M1 has problems, and the J1a Denham end shares its congestion with the M25. Live incidents and closures refresh every 5 minutes.