All papers except for two are PDF documents describing the physics of the ITE yellow change interval equation.
The two "Empirical Data" downloads are zip files of Excel spread sheets and graphs. The "Verifying Solution" download contains Excel spread sheets graphing red light violations rate versus time-into-red for various tuples of yellow change interval and traffic lane. The analysis considers 140,000 data points from raw red light camera data from many intersections. The analysis shows that when traffic engineers decrease the yellow light by 1 second, the tail end of curve extends 1 second further into the time into red. The amount of time into red is predictable by the equations of motion defined in the papers.
The other empirical download is the "Yellow Time Affecting" zip file. It contains graphs from over a dozen cities in the USA. These graphs show red light running rate versus yellow change interval. The graphs demonstrate that run red light running is almost solely a function of the duration of the yellow light.
The conclusion is that red light running is not a function of errant driver behavior but rather of the conflict between traffic engineering practice and the laws of physics.
| File | Action |
|---|---|
| Extended Kinematic Equation for Yellow Change Intervals; Mats Jarlstrom, February 2020 | Download |
| Explanation of Mats Jarlstrom's Extended Kinematic Equation; Jay Beeber, ITE Journal, March 2020 | Download |
| Webinar 1: Physics of the Yellow Change Interval; NSPE-NC Ceccarelli | Download |
| Webinar 2: Misapplications of Physics of the Yellow Change Interval; NSPE-NC Ceccarelli | Download |
| Webinar 3: Engineering Malpractice: Yellow Lights, Red-Light Cameras and Jurisprudence; NSPE-NC Ceccarelli | Download |
| Yellow Change and All-Red Clearance Solution; Ceccarelli | Download |
| Traffic Technology International Cover Story - Red Light Cameras Exploit Bad Physics of Yellow Light Equation; Ceccarelli | Download |
| Derivation of the Yellow Change Interval Formula; Ceccarelli | Download |
| 4 Problems with the ITE Equation; Ceccarelli | Download |
| Misapplied Physics in the Yellow Change Interval; Ceccarelli, Shovlin | Download |
| Empirical Data Showing RLC Violations vs Time Graphs; Ceccarelli | Download |
| Empirical Data Verifying Yellow Change and Red Clearance Solution; Ceccarelli | Download |
| The Problem of the Amber Signal Light in Traffic Flow; Gazis, Herman and Maradudin | Download |
| Determination of Left Turn Yellow Change and Red Clearance Intervals; Chiu Liu | Download |
| Dilemma Zone Driver Behavior as a Function of Vehicle Type, Time of Day and Platooning; Timothy Gates | Download |
| Version | 5 |
| Download | 125 |
| Stock | ∞ |
| Total Files | 15 |
| Create Date | December 29, 2015 |
| Last Updated | January 13, 2023 |
