The February 2011 Christchurch earthquake resulted in significant changes to the Metro bus network with the two key changes. The first change was the removal and or reorganisation of many routes due to the closure of the central city, road damage along routes, or reduced patronage. The second change occurred in December 2012 with the shift of the bus network from a radial network to a hub and spoke model network and the Blue Line was introduced. This resulted in many services being localised to hubs with connecting core services into the Central City and Cross Town.