Automatic half-barrier level crossing on the Wales route (ELR SWM2).
Information only. Always follow the signals and barriers at the crossing. Predictions may be wrong.
| 09:50 | 🚆 2N13 | Maesteg → Ebbw Vale Town Down (S → N) | on time |
| 09:51 | 🚄 1B05 | London Paddington → Swansea Up (N → S) | +5 min |
| 09:54 | 🚄 1W16 | Milford Haven → Manchester Piccadilly Down (S → N) | passed |
| 09:55 | 🚛 6R79 | Newport Docks → Margam T.C. Up (N → S) | cancelled |
| 10:04 | 🚄 1L14 | Swansea → London Paddington Down (S → N) | approaching |
| 10:13 | 🚄 1B38 | Cardiff Central → Fishguard Harbour Up (N → S) | active |
| 10:14 | 🚛 6H25 | Margam T.C. → Llanwern Exchange Sdgs Down (S → N) | cancelled |
| 10:16 | 🚧 3S62 | Stormy → Port Talbot Up Sidings Down (S → N) | -4 min |
| 10:27 | 🚆 2B52 | Pembroke Dock → Cardiff Central Down (S → N) | +1 min |
On today’s timetable, Pontsarn crossing is predicted to be closed for about 4 h 51 min between 06:00 and 22:00, across roughly 115 closures. The longest single predicted closure is 5 minutes. Freight paths scheduled “as required” (most don’t run on any given day) aren’t counted here; when one does run, the live timeline above shows it.
Longest closure so far today: 3.9 min (09:01–09:05, 2 trains), timed from trains actually seen on the signalling wire: the window edges use the same per-type margins as the forecast, since barrier positions aren't in any feed we can read.
Closures cluster around 08:15–09:15 in the morning and around 17:27–18:27 in the evening. Gaps between closures are longest outside those windows. Other days run a different timetable, so the peaks move.
The crossing is on Pont Sarn Lane near Pendoylan, Vale of Glamorgan.
Pontsarn is a automatic half-barrier crossing (AHB) on the Down–Leckwith Loop North Jn line (Wales route · ELR SWM2). The approaching train itself triggers the closure at a fixed point on its approach. Forecasts here combine the working timetable with live train-movement data (and live signalling where the crossing has it), so they reflect actual running including delays and freight, though they can still be wrong when the network is disrupted.
We score this page against what actually happened on the railway: over the last 7 days that covered 753 trains through this crossing.
99.9% of observed passes were being warned about on this page when they passed, and 97.3% of the warnings we could verify came true.
Typical timing error was ±1s (9 in 10 within 10s). This scores when trains pass: barrier movements aren't in the public feeds we can score against.