Poor public transport explains the UK’s productivity puzzle

Re:Poor public transport explains the UK’s productivity puzzle by barrkel on Sunday April 07, 2019 @11:07AM (#19597209)

Roundabouts are fine for cars on slow to medium speed roads - 20 to 40mph at a push. But they are a lot less efficient for longer trips. You don't get roundabouts on motorways or big dual carriageways. Slip roads and grade-separated junctions - often grade-separated roundabouts - are more efficient for time.

Grade separated junctions also take up a lot of space and divide communities, so I'm not 100% in favour.

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Re:Poor public transport explains the UK’s productivity puzzle by NeedMoreTea on Sunday April 07, 2019 @12:08PM (#19597688)

Not true. Motorway exits are normally a roundabout, with busiest exit slip roads traffic light controlled. Sometimes the roundabout is broken up with more extensive lights. A defining characteristic of motorways is the absence of junctions on the actual motorway.

Dual carriageways sometimes adopt a motorway approach, with traffic light controlled slips, but are mainly roundabouts for junctions. It's been a while, but even on the A1, outside the A1M bits.

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Re:Poor public transport explains the UK’s productivity puzzle by barrkel on Sunday April 07, 2019 @02:42PM (#19598959)

It is not true that motorways go straight into roundabouts. They normally use sliproads to grade separated roundabouts.

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Re:Poor public transport explains the UK’s productivity puzzle by NeedMoreTea on Sunday April 07, 2019 @05:34PM (#19600041)

There's a slip road on and off the motorway and a roundabout at the end of motorway restrictions. That is straight into a roundabout. There are no junctions on motorways themselves. That was the whole point.

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