The East Coastway line is a railway line along the south coast of Sussex to the east of Brighton, England. Trains to the west of Brighton operate on the West Coastway line. Together with the West Coastway and the Marshlink line to the east, the line forms part of a continuous route from Havant to Ashford. The Brighton Main Line route to Eastbourne and Hastings, via Plumpton and Cooksbridge, shares the East Coastway line east of Lewes station.

The West Coastway line is a railway line in England linking the conurbations of Brighton/Hove/Littlehampton and Southampton/Portsmouth, with 1.3 million people between them. It has short southward branches to Littlehampton and Bognor Regis, which offer direct services to and from London.