M4 Rush Hour Mayhem: Oil Spill Causes Major Delays for Commuters

Published on November 19, 2025 at 06:58 AM
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Table of Contents

  1. Motorway Closure Details
  2. Diversion Route

A MOTORWAY is currently closed due to an oil spill, resulting in significant delays for drivers.

Commuters on the M4 are experiencing extensive tailbacks between junction 12 for Theale, Berkshire, and junction 11 – the A33 link at Reading south, which is closed this morning.

Night vision image of a busy highway with cars, indicating rush hour traffic and potential oil spillage on the M4 in Berkshire.A crash overnight led to an oil spillCredit: Traffic Cameras Nighttime view of heavy traffic on a wet highway with car headlights and taillights visible.Sections of the M4 are now closed, leading to significant delaysCredit: Traffic Cameras

A detour has been set up for drivers, which is now also facing congestion through Reading.

The oil spill resulted from a crash overnight, and emergency crews are actively working to clean it up.

National Highways states: “A complete closure has been put in place to allow service providers to work on-site to resurface the road.”

National Highways has provided the following diversion route:

  • Exit the M4 at J12 Theale Interchange and at the roundabout take the first exit onto the A4 Bath Road towards Reading
  • Continue on the A4 towards Reading and at the traffic light-controlled junction with the A4155 near Southcote, turn right to stay on the A4 (Berkeley Avenue)
  • At the traffic light-controlled junction with Rose Kiln Lane, turn right
  • Follow Rose Kiln Lane to the traffic light-controlled junction with the A33 Basingstoke Road and turn right.
  • Follow the A33 Basingstoke Road southbound to the M4 J11 Three Mile Cross Interchange,
  • At the interchange roundabout, take the second exit to rejoin the M4 eastbound

What caused the closure of the M4?

The closure was caused by an oil spill resulting from a crash that occurred overnight.

What is the diversion route for drivers?

Drivers are advised to exit the M4 at J12 Theale Interchange and follow a specified route through Reading to rejoin the M4 at J11.

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