There has also been a need for a further river crossing in the area. A long-standing proposal has been for a four-lane tolled bridge providing a road link between Beckton and Thamesmead on the south bank: the Thames Gateway Bridge. A public inquiry on the bridge closed in May 2006, it being particularly contentious in the residential neighbourhoods between Plumstead and the Danson Interchange (a junction on the A2). The plans were shelved, along with the DLR Dagenham extension, by Boris Johnson when he came to power in 2008. However, in the run up to the 2012 election Mayor Johnson has started to push for a crossing at Silvertown (the western end of the docks)