Effects of Countdown Timers on Driver Behavior After the Yellow Onset at Chinese Intersections

@article{Long2011EffectsOC,
  title={Effects of Countdown Timers on Driver Behavior After the Yellow Onset at Chinese Intersections},
  author={Kejun Long and Lee D. Han and Qiang Yang},
  journal={Traffic Injury Prevention},
  year={2011},
  volume={12},
  pages={538 - 544}
}
Objectives: Few studies have focused on the effect of countdown timers at signalized intersections in China, where such timers are widely deployed for their perceived benefits of increased safety and capacity. This study examines the effect of countdown timers on driver behavior during the yellow interval. Method: Signal phasing and traffic operations were videotaped at 4 comparable signalized intersections under normal conditions. Microscopic details were extracted manually at 25 Hz to yield… 

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