A417 road (Great Britain)

A417 road (Great Britain) is a major trunk road in England, forming a crucial link in the national highway network. It connects the M5 motorway near Gloucester to the M4 motorway near Swindon, providing a primary route across the Cotswolds and addressing a significant gap in the motorway system. The road is particularly noted for its challenging section through the Air Balloon Roundabout and the steep ascent of Birdlip Hill, which have been the focus of long-standing improvement campaigns.

Route description

The A417 begins at its junction with the M5 motorway at Brockworth, near Gloucester, immediately intersecting with the A46. It heads southeast, climbing the Cotswold escarpment past Birdlip and through the notorious Air Balloon Roundabout, a major junction with the A436. The route continues across the high ground of the Cotswolds Area of Outstanding Natural Beauty, passing near Cirencester and the source of the River Thames at Thames Head. It skirts the Wiltshire border, serving villages like Ampney Crucis and Ampney St Peter, before descending to meet the A419 and ultimately terminating at the M4 motorway at Junction 15 near Swindon. This corridor provides a vital connection between the South West and the Thames Valley, bypassing the congestion of Bristol.

History

The modern A417 follows the path of ancient routes across the Cotswolds, including historical turnpike roads established in the 18th century. Its current numbering was assigned in the 1920s as part of the Ministry of Transport's road numbering scheme. A key development was the opening of the M4 motorway in 1971, which increased traffic pressure on the northern section from Gloucester. The southern section between Cirencester and Swindon was significantly upgraded to dual carriageway in the 1990s, forming part of the A419/A417 "Swindon to Gloucester Corridor". However, the remaining single-carriageway section through the Air Balloon Roundabout became a notorious bottleneck and accident blackspot, leading to sustained calls for its improvement.

Major junctions

{| class="wikitable" |- ! County ! Location ! mi ! km ! Destinations ! Notes |- | rowspan="2" | Gloucestershire | Brockworth | 0.0 | 0.0 | M5 motorway – Birmingham, Bristol, Exeter | Southern terminus, junction with M5 J11A |- | Birdlip | 3.5 | 5.6 | A436 east – Cheltenham, Oxford | Air Balloon Roundabout |- | rowspan="2" | Gloucestershire / Wiltshire border | Cirencester area | 20.1 | 32.3 | A429 – Cirencester, Malmesbury | Roundabout junction |- | Ampney St Peter | 24.9 | 40.1 | A419 south – Swindon, M4 motorway | Northern terminus of A419 concurrency |- | Wiltshire | Swindon | 55.0 | 89.0 | M4 motorway – London, South Wales, Bristol | Northern terminus, junction with M4 J15 |}

Proposed improvements

For decades, the single-carriageway section between the Air Balloon Roundabout and Cowley has been the subject of major upgrade proposals due to its poor safety record and severe congestion. National Highways (formerly Highways England) has advanced plans for a new dual carriageway bypass, known as the **A417 Missing Link** scheme. The preferred route, announced after extensive consultation, would run from the M5 motorway at Brockworth to the A419 at Swindon, bypassing the Air Balloon Roundabout and Birdlip Hill. The project has received support from local authorities like Gloucestershire County Council, business groups such as GFirst LEP, and environmental assessments have been conducted considering the Cotswolds Area of Outstanding Natural Beauty. As of the early 2020s, the scheme is progressing through the Development Consent Order process.

Cultural references

The A417, particularly its scenic but treacherous stretch over the Cotswolds, has featured in various media. It has been the subject of numerous reports by the BBC and ITV concerning its traffic problems and safety campaigns. The road's landscape is often highlighted in travelogues about the Cotswolds, and its notorious junctions are frequently discussed in motoring publications like Autocar. The long-running campaign for the "Missing Link" upgrade has been covered in regional newspapers such as The Citizen and the Wiltshire and Gloucestershire Standard, becoming a significant local political issue.

Category:A roads in Zone 4 of the Great Britain numbering scheme Category:Transport in Gloucestershire Category:Transport in Wiltshire Category:Roads in the Cotswolds