Signs can prevent devastating accidents. Don't let drivers run through a traffic light because they're speed is too high to fully stop. Post a sign to warn drivers of an upcoming traffic light.
Standard: 01 The Advance Traffic Control symbol signs include the Stop Ahead (W3-1), Yield Ahead (W3-2), and Signal Ahead (W3-3) signs. These signs shall be installed on an approach to a primary traffic control device that is not visible for a sufficient distance to permit the road user to respond to the device (see Table 2C-4). The visibility criteria for a traffic control signal shall be based on having a continuous view of at least two signal faces for the distance specified in Table 4D-2.