This article is about the Class III road numbered C506 maintained by Sunderland Council. For other roads numbered C506, see C506.
The C506 is listed as Downhill Lane and Follingsby Lane, only a small portion of which are within the Sunderland metropolitan council area. The road begins on the A1290 near the Nissan factory in Washington and heads north-west as a narrow country lane. After less than half a mile, it passes a former farm building and reaches a stone bridge over the River Don. The local authority boundary follows the river here and so this is where the C506 ends.