In addition to the above rail links, Terminal 5 station also has two safeguarded "heavy rail" platforms for use by a west-facing connection to the National Rail network. The south-leaning proposal would spur off the Waterloo to Reading Line west of Staines railway station (originally dubbed Heathrow Airtrack, with a newer proposal named Heathrow Southern Railway). It proposes direct rail services to London Waterloo, Reading, Woking, Guildford and Gatwick Airport. Due to the cost of replacing three level crossings, one in a very urban part of Egham, the proposals are currently unfunded.