A very dangerous way to live! suppose fred dibnahs mate is trundling along at 10 mph in 20 ton of steam roller or two wee kids are slowly cycling....
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Suppose I'm on the roundabout and for whatever reason someone approaching the roundabout is going to fail to give way. He might be tired or distracted or something. With normal visibility I'm well placed to recognise he's approaching too fast to stop and take my own avoiding action. With the visual barrier I lose the chance to avoid the crash.
too true. most accidents need two events to start. the first event has already happened is driver error and event no 2 was planned by the road designer.
Also paul may be coming round the roundabout I can't see him my decision to go or stop becomes very short. I only need a split second mistake or a sneeze to mess up. I might sneeze and decide to stop as I can't see causing a rear end pile up.
It is also not very green. If you have to loose all speed to enter every roundabout that is a lot of unnessesary petrol, desiel and noise. It punnishes drivers who think and plan ahead, those who drive smoothly and retrains them as stop go merchents.