The West Sussex airport has agreed that 54% of air passengers will use public transport by the time a new northern runway opens – potentially in just four years. Greater use of public transport by passengers travelling to Gatwick Airport has been agreed, as part of the government’s approval of a long-planned second runway. Greater use of public transport by passengers travelling to Gatwick Airport has been agreed, as part of the government’s approval of a long-planned second runway. The West Sussex airport has agreed that 54% of air passengers will use public transport by the time a new northern runway opens – potentially in just four years. The airport is also served by frequent Southern and Thameslink trains, as well as by Great Western services to Reading.