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Traffic lights out of sync

Reported via mobile in the Traffic lights (NH) category anonymously at 21:20, Sat 29 November 2025

Sent to National Highways less than a minute later. FixMyStreet ref: 8480988.

Traffic lights only allowing a maximum of 3 vehicles through on green at any one time, causing long tailbacks into Copthorne and gridlock onto the roundabout at peak times, as well as long queues on the M23 exit slip from the northbound carriageway. This has been an issue for the last 3 days.

Updates

  • Huge tailbacks of traffic

    Posted anonymously at 10:36, Tue 2 December 2025

  • This is a dangerous situation and WILL cause an accident on the motorway if not addressed soon. The lights are only staying green for 6 seconds.

    Posted anonymously at 09:03, Wed 3 December 2025

  • Fault still in place causing significant congestion on roundabout.

    Posted anonymously at 16:52, Wed 3 December 2025

  • Fault still in place and traffic lights in all directions are only allowing 3/4 vehicles through at any one time. It was chaos at 2pm this afternoon trying to get from east grinstead to Crawley - and it’s even worse at rush hour.

    Posted anonymously at 19:51, Wed 3 December 2025

  • Folks,

    You may already be aware but the lights at the roundabout over the M23/Copthorne Way/Crawley avenue are not working correctly. Each light is staying green for no more than 10 to 15 seconds. This is causing huge tail backs in both directions. During rush hour this morning the tail back was as far as the Copthorne Golf Club.

    Even now at 10:30am there is tail backs in both directions.

    Hope this helps,

    Posted anonymously at 10:47, Thu 4 December 2025

  • The traffic lights are still causing problems. Only letting about 3 cars through at a time. It is particularly dangerous for those on the m23 who are trying to leave via the slip road as the lights are causing long queues on the carriageway. This needs to be fixed ASAP as an accident is bound to happen

    Posted anonymously at 08:41, Fri 5 December 2025

  • RTC on roundabout today due to traffic attempting to squeeze through on to southbound slip road through the congestion on the roundabout caused by the out of sequence lights. Please fix the issue.

    Posted anonymously at 20:39, Fri 5 December 2025

  • Traffic lights on roundabout out of sync and are only allowing a maximum of 3 vehicles through on green at any one time, causing long tailbacks / gridlock at peak times, as well as long queues on the M23 exit slip from the northbound carriageway - this is very dangerous! This has been an issue for the last days and has still not been fixed. Why no action? Sort it out National Highways!

    Posted anonymously at 09:43, Mon 8 December 2025

  • These lights are still not working correctly. Why is it taking so long to resolve a timing setup. The queueing traffic on the M23 is significant and dangerous.

    Posted anonymously at 08:33, Tue 9 December 2025

  • Thank you for contacting National Highways.

    We are pleased to confirm that the issue you reported around the operation of the traffic lights has now been resolved. We hope that this improves any future experience you have using this road.

    Kind regards

    National Highways

    State changed to: Closed

    Posted by National Highways at 15:35, Tue 9 December 2025

This report is now closed to updates from the public. You can make a new report in the same location.