TWO separate collisions are causing major delays across the county this morning.
Police were called at 9.58am to the eastbound stretch of the A423 Southern By-Pass Road.
Emergency services have reported no serious injuries.
Lane two of the carriageway remains blocked as police and highways teams clear the scene.
Heavy traffic has been reported in the area as a result.
In another collision a black BMW and black Mercedes reportedly collided on the A34.
Police were called at around 9am who reported one of the cars had hit the central reservation and was blocking the fast lane between Abingdon north and Marcham Road junctions.
By the time police arrived at 9.33am no cars were at the scene, although officers found some damage to the central reservation and some debris on the road.