The A20 heads east from Peel, meeting the A3 north of St Johns.
The route starts somewhere in the town centre area, although different maps seem to suggest different possibilities, and the signage is non existent. The Isle of Man Government, however, suggest that the A20 meets the A4 at the fork between Derby Road and Christian Street. Derby Road is the A20, but is one-way into town, with the A4 being one way out, and Church Street (which may be a B road) being the third side of the one-way system. Derby Road itself passes between the Town Hall and St Germans Cathedral, seat of the Bishop of the Diocese of Sodor and Man. Derby Road continues beyond the one-way system, climbing gently on a long straight, passing a school, supermarket and swimming pool, before crossing over two roundabouts, becoming Poortown Road at the first.
The edge of the town is soon reached, and the A20 continues its gentle climb along long straights, before a rather sudden sharp right hand bend is followed quickly by a left hander. These take the route over its summit, and it now winds down to the banks of the River Neb, curving along the river bank to meet the A3 between Doran's Bend and Ballig Bridge over the river.
History
As originally numbered in the 1920's, the route was given the B24 number. It had been renumbered as the A20 by 1963.
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