What is the acceptable flash frequency range for turn signals?

The acceptable flash frequency range for turn signals is 60 to 120 flashes per minute. This range is established to ensure that the signals are visible and easily perceived by other drivers. A frequency within this range provides a consistent visual cue, making it clear when a driver intends to turn or change lanes. If the flash rate is too low, it may not attract enough attention, whereas if it is too high, it could become disorienting and fail to relay the intended message effectively. Thus, maintaining a frequency in this range is crucial for effective communication on the road, enhancing safety for all users.