When the Victoria line was built, there were severe budget restrictions. As a result, the station infrastructure standards were lower than on older lines and on later extension projects. Examples of these lower standards include narrower than usual platforms and undecorated ceilings at Walthamstow Central, Blackhorse Road and Tottenham Hale. This also affects lighting levels. At most stations between the up and down escalators there is a concrete staircase where an additional escalator could be installed, but has not been fitted. It can cause severe congestion at peak times. This has been remedied at Brixton in 2004 and at Vauxhall in 2006 where an additional escalator has been installed in place of the fixed stairway.