Drivers have encountered major delays in and around Yeovil this morning due to a road closure at Cartgate roundabout.
One carriageway of the A3088, from Cartgate to the Bunford roundabout heading towards the town, will be closed from today for the rest of the week while the entrance to the A303 roundabout is resurfaced.
Official diversions have been put in place for eastbound motorists heading to Yeovil on the A303, sending drivers to the A37 and A356.
As a result of the works, traffic is very slow moving on the A303, and there is also a heavy build-up of traffic in Tintinhull as drivers attempt to beat the delays.
An alternative route into Yeovil is to head west on the A303, and join up with the A30, either to Chard via the A358 or Crewkerne via the A356.
Traffic congestion has also built up further west on the A303, with delays of 10 minutes between the junctions with the A30 and the A358 currently reported by the Highways Agency.
Normal traffic conditions are expected from 9:45am.
In addition, the Highways Agency says a temporary mandatory 50mph speed limit has been introduced on the A303 from a point at the centre of the Main Street overbridge, near Tintinhull, to a point at the centre of the Stoke Road overbridge, near Stoke sub Hamdon.
The Agency is also introducing a 10mph speed limit while convoy working is taking place on the A303 from a point 250 metres east of the A3088 Cartgate roundabout junction to a point 250 metres west of that roundabout junction, and including the circulatory carriageway at that roundabout.
Overnight closures, from 8pm to 6am, are also planned on the A303 between the A356 Prophets Lane junction and the A37 Ilchester Mead junction.
For the latest information, click here to visit the Highways Agency traffic and travel latest.