Marlborough Traffic Jam Snarls A346 and A4 Roads

Ongoing roadworks and utility projects compound gridlock in Wiltshire town.

Apr. 11, 2026 at 10:24am

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A highly stylized, geometric illustration depicting a sprawling traffic jam on winding roads, with vehicles trapped in a gridlock of smooth, streamlined forms rendered in earthy tones, capturing the grand scale and frustration of the situation.Marlborough's key roads grind to a halt, exposing the fragility of the town's transportation infrastructure.Marlborough Today

Drivers in the usually bustling Wiltshire town of Marlborough faced a nightmare commute on Monday, January 12, as major traffic jams snarled the A346 and A4 roads into the town. Southbound traffic on the A346 was backed up for miles, while the A4's Bath Road, High Street, New Road, and London Road all crawled at a snail's pace due to a combination of ongoing roadworks and utility projects.

Why it matters

Marlborough relies heavily on the A346 and A4 as key arteries into the town, so the gridlock had a significant impact on local commuters and businesses. The incident raises questions about urban mobility and whether better planning could have prevented the chaos.

The details

By 8:30 a.m., queues had already stretched to staggering lengths, with the southbound A346 backed up between Ogbourne St Andrew and Ogbourne St George, and the northbound lanes extending past Postern Hill to Cadley. On the A4, temporary traffic lights on Salisbury Road at the George Lane junction, as well as roadworks scheduled to start at 9:30 a.m. on High Street and Pewsey Road, only added to the congestion.

  • On Monday, January 12, drivers attempting to enter Marlborough were met with the traffic jam.
  • By 8:30 a.m., queues had already stretched to staggering lengths on the A346 and A4.

The players

AA

The UK's largest motoring organization, which issued a warning about the severe delays and drop in average speeds on the A346.

Thames Water

The utility company responsible for the temporary traffic lights on Salisbury Road that contributed to the gridlock.

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The takeaway

This traffic jam highlights the fragility of Marlborough's reliance on the A346 and A4 as key transportation routes, and raises questions about whether better coordination and planning of roadworks and utility projects could have prevented the chaos. The incident serves as a wake-up call for the town to rethink its approach to urban mobility and explore alternatives to ease congestion.