A lot of traffic lights now have a bright white light on top of the regular stop light that turns on when the light changes to red. What are they for?

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But even a careful driver can get caught by bad traffic and a red light ... lights and have any reason to suspect they ... turns almost solid white. - Read more

... a bright white light that has a flashing ... cyclists running stop signs or red lights is 17% of ... the more chances they'll have to ... - Read more

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A lot of traffic lights now have a bright white light on top of the regular stop light that turns on when the light changes to red. What are they for? resources

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