The "Walk" light isn't supposed to stay on for more than a few seconds. The state standard is seven seconds, but can be as little as five seconds. The "Walk" light means that it's okay to start crossing. If you started crossing at the transition from "Walk" to a flashing "Don't Walk" sign, it should flash long enough for most people to make it all the way across the road before the "Don't Walk" stops flashing and the light starts to change. When the signal is flashing "Don't Walk", it is safe to finish crossing the intersection; however, it is not safe to enter the crosswalk at this time. When the "Don't Walk" stops flashing and the light changes, it is unsafe to cross the road.