Running a red light is illegal in all states and a ticket or citation for the infraction or offense may lead to a significant fine, demerit points on a driver’s license or driving record, and increased insurance premiums (upon conviction, guilty plea, or plea of no contest).

Due to limited resources many states use automated red-light cameras—also known as photo enforcement—to take a digital photograph of a vehicle (and its license plate) that violates the red light or traffic signal by entering the intersection and failing to stop after the light has turned red. The use of red-light cameras to issue traffic tickets or citations (mailed to the driver) has been controversial, with claims that it violates Constitutional rights.

Laws vary from state to state and in some states red-light cameras are a permitted enforcement tool; in some states they are prohibited; and in some states they are prohibited unless permitted by a local ordinance (city or town).

In Washington State, running a red light is considered a traffic violation and is illegal under state law. Violators can receive a ticket or citation, which may result in fines, demerit points on their driving record, and potentially higher insurance rates. Washington State permits the use of automated red-light cameras as an enforcement tool. These cameras capture images of vehicles and their license plates when they run red lights. The registered owner of the vehicle typically receives a citation in the mail. The use of these cameras has been a subject of debate, with some arguing that it infringes on Constitutional rights. However, the Washington State Supreme Court has upheld the use of red-light cameras, and various municipalities within the state have implemented them. It's important for drivers to be aware of the specific regulations in their local area, as ordinances regarding red-light cameras can vary from one city or town to another within the state.