The M8's westbound carriageway will be shut overnight to allow for repairs to a bridge struck by an HGV earlier.
Traffic on the westbound M8 has been restricted to a single lane between Junctions 4A and 5 since 13:40, as a safety precaution following the incident near Harthill service station. It will completely close from 20:00 until 06:00 on Wednesday.
A signed diversion route will be in place, between Junctions 4A and 5, via the A801, the A706, the B7066 through Harthill, and the B7057.
Drivers are being warned to expect long delays on Wednesday morning as a result, with traffic likely to still be restricted to a single lane.
The diversion later is estimated to add an estimated 1.2 miles and five minutes to affected journeys.
