Adur Interchange

Adur Interchange is a junction on the A27 Adur Viaduct.

It was built as part of the Shoreham-by-Sea Bypass, construction starting on 1 February 1968 and being completed in 1970. It was opened westbound on 14 May 1970 and eastbound on 21 May 1970, although the slip roads did not open until July 1970. The cost of the whole Shoreham Bypass, including the viaduct, was estimated to be £2,707,294.

The A27 is a two-lane dual carriageway through the junction and over the river, but has three lanes east of the junction with the slip roads merging into the third lane; these were built as extensions to the original slip roads with the building of the Brighton and Hove Bypass. The slip roads form two sweeping curved dual carriageways down to the roundabout which sits just north of the viaduct. Both pairs of slip roads cross the A283 in the process, with the slips for the westbound carriageway passing under the viaduct as well.

This junction can be confusing to use, caused by the slip roads turning 180 degrees and both parts of each road being on the same side of the roundabout.

Routes

Route	To	Notes
A27	Brighton, Shoreham Harbour (Basin & Beach) avoiding low bridge
A27	Worthing, Portsmouth, Airport, Lancing 1 1/2
A283	Steyning, Henfield (A2037), Horsham, London (A24)
A283	Shoreham