M4 Motorway Closure
Please be advised that the M4 between junctions 18 and 19 will be closed in both directions from 19:00 on 21st March, affecting road freight.
www.agi.globalHere’s the latest I could verify about M4 closures:
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There have been multiple closures on the M4 near Bristol, notably an eastbound closure between junctions 16 and 15 for resurfacing, with weekend closures between junctions 18 and 19 tied to the Badminton Road Bridge project. These closures were planned for late 2024 into 2025 and were expected to cause substantial disruption with detours in place.[1][3]
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A separate, more extensive closure occurred between junctions 18 and 19 to demolish and rebuild associated bridge structures, with re-opening anticipated in early 2026 in some reports. Travel advisories consistently recommended avoiding the closed segments when possible.[8][1]
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In one case, a temporary, short-term closure between 18 and 19 was scheduled for late March 2025 to enable demolition work on the A432 Badminton Road bridge, with reopening expected a few days later. This specific event was described as part of ongoing bridge works.[3]
If you want, I can pull the most current status for today (specific junctions, exact dates, and live detour routes) from live sources and tailor it to your planned route in Lisbon. Would you like me to do that?
Citations:
- M4 closures and timing near Bristol, including overnight eastbound work and weekend closures for Badminton Road Bridge projects.[1]
- Closure details between junctions 18 and 19 for bridge demolition and related disruption forecasts.[8]
- Additional context on bridge works and reopening expectations in early 2026.[3]