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You generally get these when the roundabout has one or more clear 'through traffic' routes, to the point that you're always 'giving way to the right' and not ab
by d1sxeyes 4y ago
You generally get these when the roundabout has one or more clear 'through traffic' routes, to the point that you're always 'giving way to the right' and not able to enter the roundabout.
If you imagine traffic on a motorway going North/South and an A-road running East-West, at busy times, the traffic going from East to West and West to East will be significant enough that traffic coming off the motorway is not able to find enough space to enter the roundabout (or, not enough to meet the demand). Without traffic lights, traffic will soon back up down the slip road onto the motorway, or worse, will try to force its way onto the roundabout instead of giving way to the right.
Traffic lights make this much safer.
- alistairSH 4y agoOr some arrangement of flyovers, ramps, etc (double diamond interchange being the current flavor of the month here in the US mid-Atlantic). Obviously, only makes sense for actual motorways, not going to get one in mid-town London, hopefully.
- avianlyric 4y agoLand is expensive enough, and built up enough, in the UK that flyovers are pretty much not an option near any major road anymore. In general the UK has very few flyovers. I sometimes suspect the SF Bay Area has more flyovers than the entire of the UK.