Those commuters who brave the treacle that is Worcester Park traffic will be leaping with excitement to know that the roundabout at the A3 is to be 'improved', starting shortly. Some information is available here and here indicating that they're expecting the work to take about 3 months.
TFL have there information here and a PDF diagram here. Quite how many
donors cyclists will be brave enough to navigate the new cycle paths with the traffic bearing down on them could be up for debate, although the speed limit on the sliproad will be down to 30......... mmmmmm, sure.
Quite what impact this will have on through traffic we will see I'm sure......