There are no bridges over the Ewenny or Ogmore rivers within the community that allow vehicle access northwards.
The nearest crossing is inland at Ewenny.
There are pedestrian crossings northwards.
The Ogmore Castle stepping stones are passable provided tides and river flows are not high.
A footbridge over the River Ewenny 400 metres (440 yd) upstream gives safe access along the coast path.
Downstream, a substantial modern bridge over the River Ogmore gives access to a sewage works, but is not a through route.
The only roads out of the community are therefore to the east and south-east.
The B4265 south-east to Wick is the only route out of the community that doesn't cross a river or stream.
 Two minor roads cross the Clemenstone Brook, one at Heol Shwlac, the other at Pont Fach.
Pont Groes Gwta (51.4614°N 3.5584°W, OS grid ref.
SS91837475), a two-arched 18th-century stone bridge, crosses the Afon Alun east of Castle-upon-Alun.
Stepsau Duon stepping stones and a ford also cross the Alun, as described above, and further west the Clapper bridge provides a pedestrian crossing of the Alun at 51.4641°N 3.57062°W, OS grid ref.
SS9099750.
Five openings through the 18th-century raised path allow the stream through, with flat stone lintels.
Further downstream, the roads east from St Brides Major village crosses the Alun at Pontalun, and the road from Ogmore crosses it at the confluence with the River Ewenny, both by inconspicuous modern bridges.

The railway, built in 1885, has two bridges over minor roads, and four times crosses the Afon Alun over impressive brick arches in its journey along the Alun valley.
There are no bridges over the Ewenny or Ogmore rivers within the community that allow vehicle access northwards. The nearest crossing is inland at Ewenny. There are pedestrian crossings northwards. The Ogmore Castle stepping stones are passable provided tides and river flows are not high. A footbridge over the River Ewenny 400 metres (440 yd) upstream gives safe access along the coast path. Downstream, a substantial modern bridge over the River Ogmore gives access to a sewage works, but is not a through route. The only roads out of the community are therefore to the east and south-east. The B4265 south-east to Wick is the only route out of the community that doesn't cross a river or stream.  Two minor roads cross the Clemenstone Brook, one at Heol Shwlac, the other at Pont Fach. Pont Groes Gwta (51.4614°N 3.5584°W, OS grid ref.SS91837475), a two-arched 18th-century stone bridge, crosses the Afon Alun east of Castle-upon-Alun. Stepsau Duon stepping stones and a ford also cross the Alun, as described above, and further west the Clapper bridge provides a pedestrian crossing of the Alun at 51.4641°N 3.57062°W, OS grid ref.SS9099750. Five openings through the 18th-century raised path allow the stream through, with flat stone lintels. Further downstream, the roads east from St Brides Major village crosses the Alun at Pontalun, and the road from Ogmore crosses it at the confluence with the River Ewenny, both by inconspicuous modern bridges.
The railway, built in 1885, has two bridges over minor roads, and four times crosses the Afon Alun over impressive brick arches in its journey along the Alun valley.
St Brides Major (community)