Closure
A40 Westbound Swakeleys to Denham carriageway closure
from 22:00
Tonight
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A40 westbound traffic at 02:52 on Monday 12 October: 1 closure tonight.
This page tracks live A40 traffic westbound only — every incident, closure and roadworks National Highways publish for the westbound carriageway, updated every 5 minutes, 24 hours a day. Anything they list without naming a direction is shown here too, so nothing is missed.
Heading the other way? See A40 eastbound traffic. The full A40 traffic page covers both directions, with the live map, junction-by-junction status, the latest A40 videos and tonight's A40 roadworks.
Q: Is the A40 westbound closed today?
No — as of 02:52 National Highways list no full closure on the A40 westbound. Live updates every 5 minutes.
Q: Are there any accidents on the A40 westbound today?
None reported at 02:52 — the live board above updates every 5 minutes, 24 hours a day.
Q: Why is the A40 slow westbound today?
Nothing is listed right now — when the board above is clear, slow westbound traffic is usually rush-hour volume (07:00–09:00 and 16:30–18:30 on weekdays).
Q: Are there roadworks on the A40 westbound tonight?
Yes — 1 overnight closure is scheduled on the A40 westbound. Times and junctions are in the closures list above and on the A40 roadworks page.
Q: Where can I check live A40 traffic westbound?
Right here — this page is live A40 traffic for the westbound carriageway, updated every 5 minutes from National Highways, 24 hours a day. The full A40 page covers both directions with the live map and junction-by-junction status.
Q: Which part of the A40 does this page cover?
The whole westbound carriageway, end to end — the A40 runs between London (Paddington) and Fishguard. The eastbound side has its own page.
Daily A40 incidents, posted across all four channels.
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