Trrl Lr 634 Experimental markings have been used in the roundabout at Slough - Central motorway interchange, to ease the problem of evening peak hour queues in the westbound exit slip road from M4. An exclusive lane was marked in the existing roundabout carriageway to allow left-turning traffic from the slip road to filter through roundabout, without having to give way to circulating traffic. …
Trrl Lr 1010 Analysis of accident at 42 roundabout at which Yellow Bar experimental carriageway markings had been laid on an approach road, showed an overall reduction in the proportion of speed-related accidents on these approach roads of 57 percent. The markings appeared to be most effective in reducing fatal and serious injury accidents, whilst still reducing slight injury accidents. The…
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