London has more then its share of high risk intersections due to poor design and geometry. I would suspect that the majority of the collisions we have in our annual top 10 collision intersections list are left turns.
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Originally Posted by dreamcamera
I sell traffic equipment and have been working with City of Halifax NS on some designs that also include these "no left without green arrow" intersections. These are usually established on high-risk intersections for accidents when turning left. I've seen them used here more for pedestrian safety, but that's usually the reason. Some behind-the-scenes traffic study recommended it.
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