|Location Map ( geo)|
|The unbuilt road, looking east.|
|Junctions related to the A284|
Crossbush Roundabout is an unfinished dumbbell interchange which should have formed the start of the A27 Arundel Bypass. It was built as part of a short bypass of Crossbush, hoping to feed onto the bigger Arundel Bypass. A temporary road was built between the two sliproads on an embankment to help relieve the western bridge, which now forms the mainline of the A27.
Consequently, this junction is a traffic blackspot. Things used to be worse for westbound traffic as to stop traffic taking the wrong post there were large boards at the start of the unused underpass which the road used to have to reduce to one lane to negotiate, only to open up to two again on the sliproad.
Since 2010s the effort to get a Arundel bypass built has begun again. The new plans for the Arundel Bypass show that Crossbush Interchange will be the eastern point of the improvements, with the junction returning to its original design of a dumbbell interchange with the A27 being D2 and the A284 passing over being S2. The slip roads will be reduced to one lane in all directions.
|Chichester, Portsmouth, Arundel, Warningcamp, Burpham, London, Dorking (A284)|
|Worthing, Brighton, Angmering, Lancing|
|Littlehampton, Lyminster, Rustington, Services|
|Arundel, Warningcamp, Burpham, London, Dorking (A29)||currently A27|