The east slip road at junction 9 of the M27 at Whiteley is closed because of an overturned trailer.
Recovery is at the scene but drivers are warned that closures will remain in place for some time as it's a complicated recovery operation.
A motorbike trailer has been stolen from a Hampshire town.
The trailer was stolen some time between February 26 and February 27 from Devon Road in Bordon.
The black coloured trailer, which is valued at £1,000, was chained to a lamp post when the offender/s cut the chains and took it.
PC Adrian Collisson, said: “I am appealing to anyone with any information about this incident to come forward and speak to us. Did you see anyone acting suspiciously in the area?"
Anyone with information should contact PC Collisson at Alton police station on 101 or call Crimestoppers, the charity, anonymously on 0800 555 111.