As a driver, I want to know when I am not allowed to cross the intersection, so that I do not run a pedestrian over.
As a driver, I want to know when I am allowed to cross the intersection, so that it is safe and I don't cause a road traffic accident.
As a driver, I want to know when I can cross safely during late night hours, so that I do not have to wait on a red light whenever there is no traffic.
As a pedestrian, I want to know when I can cross the street, so that I do not get run over by a vehicle.
As a pedestrian, I want to know when I should not cross the street, so that I do not cause any traffic incident.