After a quick research, there's no evidence of a bridge there and it seems difficult to do even for Romans. But there could have been some people with boats in Cale to help cross the river and still be considered part of the road.

I know that not too long ago there was a "bridge", which was a bunch of boats aligned from one margin to the other. Not sure if this counts as a bridge.

Fords and ferries were pretty common in Roman Britain, perhaps it was common to the provinces.