A27 road

The A27 is a major road in England. It runs from its junction with the A36 at Whiteparish in the county of Wiltshire. It closely parallels the south coast in Hampshire, then passes through West Sussex and terminates at Pevensey in East Sussex.

Historically, for longer distance movement along the south coast, the M25 in combination with the M2, M20, M23 / A23, A3 / A3 and M3 has provided an attractive alternative to the actual south coast route of A259, A27 and M27. In 2002 an offpeak journey between Margate and Southampton via the M25 took 2 hours 30 minutes, and via the coastal route using the A259, A27 and M27 took 3 hours 50 minutes. The reason why the coastal route is so much slower than the M25 alternative is largely due to a series of bottlenecks on the A27. These include Chichester, Arundel, Worthing and Polegate.

Wikipedia