Relief that is not expensive on “a bypass scale” was installed at Chiswick’s Hogarth Roundabout.

A filter lane for light traffic heading in one direction only eases congestion and speeds flow.

It has worked very well for around 50 years. I am told that something similar exists in Bristol.

In the Salisbury context, this would be feasible at the College/University and Tesco roundabouts (the latter necessarily needing completion first) in both cases for light traffic heading east.

Some compulsory purchase and detailed civil engineering would be involved.

Apart from continually updating junctions with improved intelligence for traffic lights there is little more that can be done with the existing system except improving road signing and marking: one unsure visitor delays between 10 and 100 on our ring road system.

Ian Michell


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