|Length:||95 miles (152.9 km)|
|Meets:||M3, A30, A34, B3048, A3093, A3057, A343, B3042, A342, A338, B3084, A3028, A345, A360, B3083, A36, A350, B3089, B3095, B3092, B3081, A371, A359, B3151, A37, A372, A3088, B3165, A356, A358, B3168, B3170|
|Former Number(s):||A30, B3049, A342, A344, A3036, A372, A358|
|Route outline (key)|
The A303 is the middle section of the London to Exeter trunk road. It takes a more northerly route across Salisbury plain than the A30 and is mostly D2. Passing places like Andover, Stonehenge, and Wincanton, it also carries much of the summer seasonal traffic between London and the south-west.
The A303 has a variety of standards along its route. From a high quality grade-separated dual-carriageway in the east, it ends up as a winding single-carriageway road in the west, with various standards in between. The route description examines them.
The current A303 began life in 1933, cobbling together various different roads to make a coherent through route. Made up of lots of various roads, some dating to 2000 BC in the Stonehenge area, it has had a vast array of improvements. When the M3 opened, the A303 and not the A30 became the main trunk road between Basingstoke and Devonshire House.
In December 2017, it was proposed that the A303 in England could be upgraded to an expressway as part of the proposals to introduce a new type of road network. The proposal includes different expressway types with an aspiration that the highest quality expressways will be given motorway designation and an Ax(M) number. (Source: Highways England Strategic Road Network Initial Report)
Notable locations and improvements
|1933||Whole road||A303 created.|
|April||1958||Whole road||Gains trunk road status|
|Sept 12||1969||Andover||D2 by-pass opens|
|Oct 30 1985||Weyhill||D2 by-pass opens|
|August 12 1969||Amesbury||D2 by-pass|
|March 8 1977||Wincanton||D2 by-pass|
|July 19 1988||Ilminster||S2+1 bypass of Ilminster.|
- Creating an Expressway to the South West - 2016 (archive.org)
- Stonehenge Improvements consultation document January 2017 (archive.org)
- Sparkford to Ilchester - March 2017 (archive.org)
- The A303 Trunk Road (Sparkford to Ilchester Improvement and Slip Roads) Order 1996
- The A303 Trunk Road (Sparkford To Ilchester Improvement And Slip Roads) (Detrunking) Order 1996