Boomtown 2026- Chapter 5: Radical Redesign will see 63,000 people at the festival on the Matterley Estate, between Wednesday, August 12 and Sunday, August 16. Here are the road closures and speed limits to be aware of. On the A31 Westbound side, Lane closures and merges will be operation on the A31 Westbound during the festival. On the A31 Eastbound side, there will be lane closures and merges on the A31 Eastbound on Monday August 17, use lane 1. Residents wishing to use a road that is closed may approach accredited staff on duty at these locations to request access.