Two separate crashes have closed lanes on the A14 near Newmarket.
One lane is closed on the A14 eastbound between Junction 37 and Junction 38 due to a two-vehicle crash.
Police are on the scene dealing with the incident and National Highways traffic officers are reportedly on route to assist.
Meanwhile, one lane of the same road is shut westbound after a vehicle collided with the central reservation and crossing from the east carriageway to the west.
National Highways are advising motorists to expect delays of around 30-60 minutes in both directions.
Normal traffic conditions are expected between 8.30pm and 8.45pm for road users travelling westbound, while normal conditions will return between 4.45pm and 5pm eastbound.
A spokesperson for Cambridgeshire Constabulary said no injuries had been reported.
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