London's public transport system is pretty robust, with plenty of Tubes, buses and overground lines zig-zagging across the city. At rush hour, though, squeezing onto a crammed DLR carriage can be a total nightmare. One alternative is a taxi-hailing app like Gett, which for some time now has been pushing Gett Together, a ride-sharing service that operates on preset routes across the city. Today, the company is announcing Black Bus 1, a new route that operates between Highbury & Islington and Waterloo. The expansion is notable because it was designed using data supplied by mobile navigation app (and now bus route operator) Citymapper.