Road works and temporary traffic lights are causing severe delays in Purley.
Motorists have taken to Twitter to complain of traffic chaos on A23 Brighton Road in both directions at the junction with Stoats Nest Road.
User @abbie1634 tweeted: 'What has happened in Purley. Traffic is a joke,' and @juliapritchard tweeted 'The traffic in Purley today is absolutely ridiculous.'
Another user @capatterson94 added 'Purley being at a complete standstill is really inconvenient- added another 20 minutes to my journey."
There is congestion southbound to Purley Cross and northbound to Coulsdon South Station.
Drivers are advised to avoid the area.
Have you been affected by the road works? Leave your comments below.