The reason for these sudden changes in traffic signals is because there is less frequent occurrence in small towns or larger cities, or cities, and that the less significant volume of traffic is causing the lights to switch from the standard green-amber-red cadence to indicate a single color. If the lights are flashing amber, this is a warning signal and should be followed by a stopwatch. The number of traffic disruptions is also a factor, and if the lights start flashing red, this could result in a traffic violation.