Complex sentence: At the time of its inception in the early 2000s, the centre was Auckland's largest transport project ever, and was built to both move rail access closer to the city's CBD and help boost Auckland's low usage of public transport.
Split into simpler sentences: At the time of its inception the centre was Auckland's largest transport project ever. The centre was built to move rail access closer to the city's CBD and help boost Auckland's low usage of public transport.