At some intersections motorists get the green arrow to turn left at the same time as pedestrians crossing the street the car is planning to turn into get the walking green man. It's polite in such situations for the driver to remain in place until the last pedestrian has crossed but all too often the front turning car creeps menacingly closer to the people lawfully walking. It's intimidating and it doesn't save the driver any time. It's such an ingrained response that not long ago an elderly man actually gave me a wave once he'd reached the safety of the footpath. He was obviously grateful that (unlike a lot of drivers) I didn't move forward even a centimetre while he was crossing.
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