These pictures are signal lamps in Korea. Korea recently start to install bicycles signal lamps, for a lot of people use bicycles in Korea. I haven't seen a bicycle signal in Korea because when I lived in Korea, it didn't exist. The second one is a pedestrian crossing signal lamp; it is common in Korea. If you want to cross a pedestrian crossing, you will wait for a green lamp. The last one is of traffic lights; it consist of three or four lamps. A arrow lamp is a turn signal. I haven't seen the turn signal in the USA. I think the arrow lamp need to install in the USA. If the USA installs the arrow lamp, car accidents will reduce.
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