Two cars were badly damaged during a smash on the M65 last night.
The drivers of the Ford Ka and Peugeot 206 walked away from the 8pm collision uninjured.
But the three-lane westbound carriageway between Accrington and Blackburn was closed for around 40 minutes.
Hyndburn fire crews, paramedics and police all attended the scene.
A Lancashire Constabulary spokeswoman said: “It's not clear what happened but both the vehicles ended up facing the wrong way.”