The four side arches are fairly plain. The Roman ford lay beyond the bridge, on the North side.

Medieval Thornborough Bridge is the oldest bridge in the county, but this East to West river crossing is at least 1,200 years older; it dates back to Roman times.

Three Roman roads met and crossed each other here, and by the North side of this six arch medieval bridge over Padbury Brook was a Roman ford, made from limestone blocks held in place with wooden stakes. These were found during excavations in the 1970s.

Also found were three oak pilings on the East bank, and the ends of a road over thirty feet wide on both river banks.

Two of the arches are more ornate, with four chamfered ribs.

One of these roads came North from Akeman Street (the A41) at Fleet Marston near Aylesbury. Part of it is still used as a road, and it was once part of the old turnpike route to Buckingham. After the river crossing it went through modern Akeley and beyond.