Britomart Transport Centre, also known as Britomart railway station, is the public transport hub in the central business district of Auckland and the northern terminus of the North Island Main Trunk railway line. It combines a railway station in a former Edwardian post office, extended with expansive modernist architectural elements, with a bus interchange. It is at the foot of Queen Street, the main commercial thoroughfare of the CBD, with the main ferry terminal just across Quay Street. The centre was the result of many design iterations, some of them being substantially larger and including an underground bus terminal and a large underground car park. Political concerns and cost implications meant that those concepts did not proceed. However, at the time of its inception in the early 2000s the centre was still Auckland's largest transport project ever, built to move rail access closer to the city's CBD and help boost Auckland's low usage of public transport. It is one of the few underground railway stations in the world designed for use by diesel trains, although their use is now prohibited. Diesel trains from Hamilton and Wellington terminate at The Strand station, where a connecting bus continues onto Britomart. Initially seen as underused and too costly, it is now considered a great success, heading for capacity with the growing uptake of rail commuting. Limitations on further patronage are primarily due to the access tunnel from the east which provides only two rail tracks, and the lack of a through connection via a rail link to the North Shore or to the Western line via a tunnel, which would change it into a through station. A tunnel to the Western Line is now under construction, as part of the City Rail Link project. Additionally, Auckland Transport and Auckland Council have made a joint submission to the New Zealand Geographic Board to have the station officially named Waitematā railway station. History Earlier uses Britomart is on reclaimed land in the middle of what was once Commercial Bay. It is named after Point Britomart, a former headland at Commercial Bay's eastern end. In the 1870s and 1880s the headland was levelled and used to fill in Commercial Bay in order to extend the railway line to the bottom of Queen Street. Auckland Railway Station moved west from its original 1873 site to Britomart in 1885 and remained there after the Post Office was built