- Posts: 30
- Joined: Tue Apr 26, 2016 7:33 pm
That "splaying" as you call it is nowhere near wide enough for them to create a grade separated junction on that side of the roundabout. For a start, the incline up to get over the roundabout would have to be really quite steep - much steeper than you usually get in the UK (although not some developing countries!). Second the exit and entrance ramps would be very short: too short to speed up and slow down, in my view.
I think the reason for the splaying is much more mundane: it reduces the extent to which cars entering and exiting the (non grade-separated) A4232 will have to turn. If they had not splayed a car entering would have to start turning right around the roundabout and then start turning left. That would slow them down for sure and could potentially be dangerous.
So I'm afraid we're likely to be stuck with an at-grade A4232 for the remaining section - if it ever gets completed!