Road design, safety and Vision Zero

[ijmorlan]

I mean, the whole point is NOT to do that in order to slow traffic lol. For a turbo roundabout maybe a little contouring is expected. FWIW, I think islands on the four lane road would be appropriate, crossing four lanes of traffic is pretty dangerous. And I'm not sure of the scale, the crossings feel pretty far from the circle.

I'm curious, what did you use to create this? It looks excellent!

As drawn, trucks would be simply unable to navigate it at all. But on the other hand, slowing traffic at the pedestrian crossings is I think supposed to be a goal of roundabouts. So the splitting/curving should be done with both goals in mind, not just to make motor vehicles move smoothly.

What we really need is a design where the radius experienced by trucks is larger than the radius experienced by passenger vehicles (but still not so large that they can blow through without slowing significantly). I don’t have any brilliant ideas on how to make that work.