How well does Vauxhall Cross function?

Last November John McNulty, TfL's Head of Interchange, spoke to Future Vauxhall about remaking Vauxhall - a key transport interchange. One of the points Mr McNulty was keen to make is that TfL considers Vauxhall 'functions well in traffic terms'.

Today I learnt that Vauxhall Cross (red circle on TfL's map below) is TfL's top priority node in Lambeth on the basis of 'Sites with the highest collision rate when compared to the average for Central' (presumably inner London). In the 36 months to December 2010 there have been 43 collisions, with seven killed or seriously injured.