Are some yellow lights TOO SHORT? (Math to check it!)

Getting a red light ticket feels really crummy. When yellow lights (“change intervals”) are set long enough, red light runners vanish. For safety, why don’t we double or triple the length of yellow lights?

Check out pt. 2: Our brains and yellow lights —

Sources cited:
“Guidelines for Timing Yellow and All-Red Intervals at Signalized Intersections”
Transportation Research Board, NCHRP 731 (2012)

“Review and Evaluation of Factors that Affect the Frequency of Red Light Running”
Texas Transportation Institute: Bonneson, Brewer, and Zimmerman (2001)

Mats Järlström’s Federal Lawsuit

“Wrongly timed Beaverton light catches many drivers”
KOIN 6 News: Tilkin (2017)

“Mats Järlström’s victorious 6-year battle over yellow lights”
KOIN 6 News: Tilkin (2020)

“Yellow light critic files free speech lawsuit”
Albany Democrat-Herald, 27 April 2017, p.A9

“An Explanation of Mats Järlström’s Extended Kinematic Equation”
Institute of Transportation Engineers: Beeber (2020)
March 2020 issue, pp.34-38

Additional reading:
“Timing Traffic Signal Change Interviews Based on Driver Behavior”
Transportation Research Record: Change, Messer, Santiago (1985)

“Analysis of yellow-light running at signalized intersections using high-resolution traffic data”
Transportation Research Part A: Policy and Practice
Lu, Wang, Wu, and Liu (2015)

“Comparison of Red-Light Running (RLR) and Yellow-Light Running (YLR) traffic violations in the cities of Enna and Thessaloniki”
Transportation Research Procedia: Campisi, Tesoriere, Canale, et. al (2020)

“Drivers’ Behavior Through a Yellow Light: Effects of Distraction and Age”
Proceedings of the Human Factors and Ergonomics Society Annual Meeting
Ohlhauser, Boyle, Marshall, et. al (2011)

“Effect of Yellow-Interval Timing on the Frequency of Red-Light Violations at Urban Intersections”
Transportation Research Record: Bonneson, Zimmerman (2004)

“The Problem of the Amber Signal Light in Traffic Flow”
Gazis, Herman, Maradudin (1959)