[scoot]

> a typical situation which makes roundabouts dangerous is when you're driving in the inside lane and you want to take the second exit

If you want to take the second exit, you should be in the outside lane to start with. In the UK, for a standard two-lane roundabout, unless indicated otherwise by road markings and/or signs the outside lane is for taking the first or second exit, and the inside lane is for taking the third and subsequent exits. You move from inside to outside as you pass the second exit.

There are also rules for indicating correctly that help smooth the traffic flow, but unfortunately many drivers seem oblivious to (or just ignore) them. Also, on smaller two-lane roundabouts more than a few drivers will cut across the inside lane (taking the shortest path) with no consideration for vehicles beside them.

[mcv]

In a regular two-lane roundabout, this difference is arbitrary. Your second exit is the third exit for cars entering before you and the first exit for cars entering later. If someone is entering from your exit, you may still be in trouble when you try to move to the outside lane after the second exit. Hence the turbo roundabout.