This article is about the historical route west of Penzance, now the A3071.
For the modern route in almost the same place, see B3317
Heading west on the A3071
The original B3317 ran between St Just and Penzance in west Cornwall.
Starting on the B3306 (which at that time had no multiplex), the B3317 headed east across the Penwith Peninsula. The largest place en route was Newbridge, after about two-thirds of the route. It then bore left on meeting the B3316 (for Newlyn) to end on the B3313 to the west of Penzance.
The road was renumbered as A3071 around 1935, with the B3317 number being reused over the then-adjacent B3316 in the same timeframe.