Real-time road closure radar, Dartford Crossing bridge & tunnel telemetry, live lane restrictions, and certified 5-year collision statistics along the 117-mile M25 London Orbital.
Interactive schematic tracking key junction nodes, dualled sections, and active Datex II incident locations.
Earlier collision cleared to the hard shoulder. Residual congestion from bridge approach merging.
National Highways and regional police traffic incident logs confirm previous carriageway closures and lane restrictions along this corridor have completed safely:
Encircling Greater London through Surrey, Kent, Essex, Hertfordshire, and Buckinghamshire, the 117-mile (188 km) M25 is one of Europe’s busiest and most economically vital circular motorways. Carrying up to 200,000 vehicles daily on its western sector between Junctions 12 (M3) and 15 (M4 Heathrow), the corridor connects 12 primary radial motorways and trunk roads to London’s international airports and the Channel ports.
The route incorporates the Dartford Crossing (A282) between Thurrock and Dartford, comprising twin two-lane tunnels for northbound traffic and the 450-metre cable-stayed Queen Elizabeth II Bridge for southbound traffic.
The M25 features extensive All-Lane Running (ALR) smart motorway sections equipped with MIDAS (Motorway Incident Detection and Automatic Signalling) loop sensors embedded in the carriageway every 500 metres.
When stopped vehicles or incidents occur, the automated system sets red ‘X’ lane signals and variable advisory speed limits. Dartford Crossing operations utilize automated wind barriers; sustained winds exceeding 60 mph trigger safety speed reductions or diversion into the eastern tunnel.
According to Department for Transport STATS19 statistics, the M25 sustained 3,840 personal injury collisions across the 5-year monitoring period, with 64 fatalities and 620 serious casualties. Collision density peaks at major multi-lane diverging junctions: Junction 15 (M4 Heathrow), Junction 16 (M40), and Junction 1a/31 at the Dartford Crossing.
Heavy commuter congestion and frequent sudden braking patterns make high-speed multi-vehicle shunt collisions the dominant casualty mechanism.
Due to the closed circular nature of the M25, full carriageway closures result in massive traffic displacement. Strategic diversions route traffic around the opposing orbital arc (e.g. anti-clockwise via northern sector if southern sector is blocked) or through designated radial connectors including the A406 North Circular and South Circular corridors.
Essential guidance compiled from National Highways operational protocols, Police collision reporting procedures, and the UK Highway Code.
No. The QEII bridge (clockwise) and both Dartford tunnels (anti-clockwise) are open. Residual congestion is adding approximately 25 minutes to clockwise journey times.
Carriageways between Junction 14 and Junction 16 are clear with all four lanes running freely under national speed limits.