B4245 (Little Mill - Abergavenny)

This article is about the original B4245, now part of the A4042.
For the current B4245, parallel to the A48 east of Newport, see B4245.

The B4245 crossed the River Usk at Llanellen

The original number of the road from Little Mill, between Pontypool and Usk, north to Abergavenny was the B4245. It was quickly upgraded to become the A4125.

In 1935, it became part of the northern extension of the A4042, which it remains.