For this project, somewhat controversial due to the interruption of the direct car connection to Grafton, the bridge was tested and in 2008–2009, strengthened. The modifications, which for structural reasons closed the bridge to all but cyclist and pedestrian traffic starting October 2008, were to ensure that the weight limit could be raised from 13 tons to 40 tons, allowing heavier buses to cross. The works also ensured that the bridge would be able to withstand a 1000-year earthquake. The bridge had been found to be in good shape, despite around 2,800 primarily minor faults being found during the upgrade, and only two pieces of reinforcing steel had to be replaced. Costs were originally expected to be around $7.3 million for new anchors at the two main piers, carbon fibre wrapping around various steelwork and improvements to footpaths.