As of 2015, it is legal to view live traffic cameras in the United States. Live traffic video is available for view on many sites.
Traffic cameras are used to monitor traffic flow and road conditions. The Weatherbug site offers live traffic cameras for many major cities across the country, which can aid commuters in choosing the best routes.
Police officers use motion-detection cameras to enforce red light and speed limit laws. The cameras capture the license plates of offenders who are then issued tickets. This type of camera is legal in most states, and resident of cities who have tried to repeal the laws have been unsuccessful.