Honolulu Rapid Transit has joined COMET as its newest member. It is the first member to join that is currently under construction, and is both the first driverless metro system in the United States and the first system to be equipped with Platform Screen Doors. The project’s first phase is due to open towards the end of 2022. When complete, the system will comprise 32km of mainly elevated metro, with 21 stations. The system will be integrated with the city’s bus network and customers will be able to use a single smartcard to travel on both rail and bus.