A crash on the M4 Eastbound between Junction 15 and Junction 16 has caused traffic to queue.
All lanes are now back open but traffic is still moving slowly.
Vehicles were being held whilst recovery work was taking place due to the incident which happened around 4:15pm.
The vehicle is now on the hard shoulder.
A police spokesperson said: "We were called at approximately 4.15pm to a collision on the eastbound carriageway.
"It looks like one vehicle has gone into the central reservation.
"There are not believed to be any injuries."
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