Quote:
Originally Posted by MrChip72
I always thought the that the rule of thumb is that when you're approaching a roundabout and you plan to exit from the 1st or 3rd (right or left exits) of the roundabout, you should always be in the outside lane well before entering the roundabout.
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If by "3rd" exit, you mean the one at 9 O'Clock, (assuming there are exits at 3, and 12) you should enter the roundabout from the left lane of a two lane entrance, and stay in the left lane until you exit.
As described previously, if you enter from the right lane, you MUST take the first (3 O'Clock) or second (12 O'Clock) exit. You may not stay in that outside lane past the 12 O'Clock exit, as the person in the left lane may properly take that 12 O'Clock exit from the inside lane. If you are in the outside lane and proceed to the next exit, you may collide with the inside car, which is properly taking the 12 O'Clock exit.
Here is a link explaining it in pictures. Open the link in the first post of the thread. The pictures explain exactly how your "rule of thumb" is incorrect. (if I am understanding you correctly)
How to Navigate Roundabouts