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Chiverton Cross

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Chiverton Cross
Location Map ( geo)
Chiverton Cross Roundabout - Geograph - 273035.jpg
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Three Burrows
Highway Authority
National Highways
Junction Type
Roads Joined
A30, A390, A3075, B3277
Junctions related to the A390
Junctions related to the A3075

The site of Chiverton Cross Roundabout in 1923

The site of Chiverton Cross Roundabout in 1923

Chiverton Cross Roundabout is probably the most famous junction in Cornwall after Innis Downs roundabout was replaced in 2007. It is the meeting point of the two busiest roads in Cornwall, the A30 and the A390 from Truro. As a result, it is notoriously busy in peak times, with tailbacks often reaching Threemilestone on the A390.

It is also the start point one of the main roads to Newquay, the A3075, and the B3277 to St Agnes.

It started life as two separate junctions; a fork junction to the north east with the then B3283 and a crossroads with the B3285 at Three Burrows. The B3285 was soon extended along its current route in the early thirties. It was then decided in 1935 that it would reclassified between Greenbottom and St Agnes as the B3277, and for the B3283 to be upgraded to A-class as the A3075, giving us four of the junction's roads.

The main roundabout was built when the B3277 was upgraded and re-aligned between Three Burrows and Threemilestone. The A3075 and B3277 were both extended to meet this new roundabout, creating a large, five armed roundabout with the A30 and the newly upgraded B3277. At this point, the B3277 to Truro was renumbered as the A390, with the old road being declassified through Chacewater and Greenbottom.

Next to be added to this ever growing complex was the Blackwater Bypass on the A30, which cut through the old B3277 to meet the roundabout to the South West. As time progressed and traffic volumes grew, the roundabout was becoming more and more unmanageable, with lots of traffic using the old road between Threemilestone and Redruth and the old A30 through Blackwater to avoid the queues on the main roads.

Plans were drawn up in 2004 for the A30 to bypass the roundabout by turning it into a two bridge roundabout on the site, with the A30 heading underneath (as well as dualling the road the the east). When it became apparent that the funds were not going to be available for this, Cornwall Council provided funding to make some fundamental changes to the junction. It added more lanes to the approaches of all of arms and two lanes off of the A390, A3075 and A30(E) and combined the B3277 and the former A30 into one arm, which meant the creation of a new roundabout on the site of the old crossroads. They also provided a filter lane for the A390 towards the A30 to Redruth, allowing traffic from Truro to bypass the roundabout all together.

There a new plans for the route, creating a new dumbbell junction to the north of the current junction which form part of the latest A30 Carland Cross - Chiverton Cross dualling scheme, meaning further realignments of the surrounding routes in the coming years.

There are services just off of the junction, including two neighbouring Petrol Stations and a Starbucks coffee within the former Little Chef building.


Route To Notes








Newquay 12, Perranporth 5, Cider Farm


St Agnes, Blackwater


St Agnes





Chiverton Cross
Related Pictures
View gallery (1)
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