The road originally started on the A5 (now B72) in the centre of Strabane. However, when that road was rerouted onto a western bypass the A38 was truncated and is now only half its original length.
Entering Strabane on the A38
The road now consists of the few hundred yards from the A5 roundabout as far as the middle of the Lifford Bridge over the River Foyle. Here the road crosses the border and becomes the N15 into Lifford.