B71 (Northern Ireland)
|Distance:||3.9 miles (6.3 km)|
|Met:||A2, B508, B507, T59|
|Now part of:||A40, B193|
|Route outline (key)|
The B71 was a short road on the left bank of the River Foyle.
The road started on the edge of Derry city centre, at the western side of the original A2 Craigavon Bridge over the Foyle, and headed upstream along the river along Foyle Road before continuing onto Letterkenny Road.
After a couple of miles the road bent to the right to move away from the river. It now headed westwards and soon reached Killea. The B71 ended here at the border and the road ahead, towards Letterkenny, was the T59.
The B71 number did not last long. In the mid-1920s the majority of the road was upgraded to Class I status, becoming the A40. However, that road turned off the B71 before reaching Killea and ran southwestwards to the border near Carrigans. The bypassed section of B71 was declassified but became the B193 a few years later. It remains these numbers.