The A494 is a trunk road in Wales and England. The route, which is officially known as the Dolgellau to South of Birkenhead Trunk Road, runs between the terminus of the M56 motorway between Mollington and Capenhurst and the A470 at Dolgellau, Gwynedd. Its northern sections remain among the busiest roads in Wales.

The M56 motorway serves the Cheshire and Greater Manchester areas of England. It runs east to west from junction 4 of the M60 at Gatley, south of Manchester, to Dunkirk, approximately four miles north of Chester. With a length of 33.3 miles (53.6 km), it connects North Wales and the Wirral peninsula with much of the rest of North West England, serves business and commuter traffic heading towards Manchester, particularly that from the wider Cheshire area, and provides the main road access to Manchester Airport from the national motorway network.