Sussex West Road Policing Unit sent a message on Twitter saying the road is ‘contaminated with what appears to be used chip fat oil’.
The A24 is partially blocked with severe delays and queuing traffic at the A283 The Pike junction due to the spillage
Police are currently directing traffic.
There is congestion reported to the Findon Roundabout and on the A283 Steyning Bypass to the B2135 Horsham Road junction.
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