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Advanced Warning Signs

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As NDOT strives to enhance the safety of the traveling public and promote better driver behavior, the Department has been evaluating and updating the use of advanced signal warning systems across the state.

A car drives under a yellow road sign that signals a stoplight ahead

Advanced signal warning systems are the yellow signs stationed over the roadway often with flashing yellow lights to draw attention to the signal ahead. The advance warning signs are placed in advance of traffic signals, often where roadway curves or other factors limit visibility or expectation of a signal.


There are three types of systems and each one has unique benefits depending on the characteristics of the intersection. 

Some advance signals contain no flashing lights or lights which continuously flash. Other advance warning signs begin flashing when the traffic signal ahead turns yellow and red, allowing drivers time to stop for the signal. This can lead drivers to unsafely speed up to “beat the light,” potentially leading to crashes.

The three types of advanced signal warning systems

Signal Updates 

NDOT has established guidelines for the most effective use of the different types of advance flasher signals, compliant with federal guidelines. Based on information from an engineering study conducted by NDOT, some of the advance signals may change from active to continuously-flashing systems.

The goal is to develop a unified approach to advanced warning systems statewide that promotes unity and consistency in the treatment of advanced signal warning systems specific to each intersections' individual needs. 

Driving Safely

Similar modifications in other states have shown a reduction in crashes, including severe crashes and crashes from drivers running red lights.

Red-light running is one of the most serious traffic problems in the nation. It is estimated that vehicles running red lights cause more than 200,000 crashes and approximately 900 deaths nationwide per year. Between 2013 and 2017, 286 people died in Nevada intersection crashes.

Intersection Safety Tips

  • Drive attentively
  • Make a complete stop at all red traffic signals and stop signs
  • Lift your foot off the accelerator and look both ways before crossing an intersection on a green signal
  • Yield to other drivers, bicyclists and pedestrians
  • Look right before turning on green
  • Motorists stopped at a red light should look both ways before proceeding on a green light to make sure the intersection is clear