West Sussex Fire and Rescue say the M23 northbound continues to be closed between Junction 10 for Crawley and Junction 9 for Gatwick due to a crash.
The closure, which started early this morning, is expected to remain in place for several hours.
Drivers are being urged to avoid the area and find alternative routes where possible.
A spokesperson for WSFRS said: "The M23 northbound is currently closed between Junction 10 for Crawley and Junction 9 for Gatwick Airport following a road traffic collision involving one vehicle.
"Joint Fire Control was alerted at 5.06am and mobilised two fire engines and a heavy rescue tender to the scene.
"The road is expected to remain closed for some time.
"Drivers are urged to avoid the area, and those heading to Gatwick Airport should use alternative routes."
Get the latest BREAKING NEWS for the SOUTH on your phone by downloading the V2 RADIO APP today!
V2VOUCHERS.CO.UK is offering half-price deals on a wide range of experiences across the South, from meals out at local restaurants to tickets for some of the region’s biggest events.


Man admits rape of woman in Worthing car park
West Sussex Fire and Rescue give tips to keep safe with e-cigarettes
Appeal after pet theft in Brighton
Police hotspot patrols in Sussex slash crime in targeted areas
Oral history mental health project launches in Worthing
Police investigating burglary at Eastbourne flat
New AI cameras to detect traffic offences in Sussex
ID sought following series of tendering offences across Sussex
Road safety work begins in Chichester
Tender options at Portsmouth's Spinnaker Tower

