I use left hand traffic in my cities and I've noticed that traffic doesn't use roundabouts properly. If I have a 3 lane roundabout the cars will only use 2 lanes on the roundabout and only use 1 lane to get on the roundabout from 2 lane roads. This does not happen with right hand traffic. This happens due to cars not you going to the correct lanes when a road exits the roundabout meaning there is never a reason for them to use the inside lane. All that needs to be done to fix it is to flip the lane rules on left hand drive cities.
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