The Physics of Yellow Change Interval at ITE International Convention
Delve into the intricate details of the physics behind the yellow change interval at the ITE International Convention. Explore the critical points, braking points, comfortable stopping distances, and the concept of unimpeded through movements. Learn about the equation for turning vehicles decelerating from maximum speed to the intersection entry point. Discover the importance of knowing the critical point and why slowing down is forbidden in certain scenarios.
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Presentation Transcript
Physics of the Yellow Change Interval ITE International Convention, 8/3/2015 1
? ????= ??+ ?? 2
? ????= ??+ ?? 3
? =?? ? 4
Critical Point, Braking Point Comfortable Stopping Distance, End of Perception-Reaction Time E B C Must Stop Must Go ? ?? ?? ???? ? 5
For the ITE yellow change interval formula to work, how fast must you go to make it to the intersection before the light turns red? ???????? ????? = ???? ????+??? ?? ?? = = ??+ ?? ?? 6
For the ITE yellow change interval formula to work . . . You must go the maximum allowable speed or faster from the critical point to the intersection entry point. Slowing down is forbidden. Which is the reason why people beat the light. You must know exactly where the critical point is. 7
ITE Yellow Change Interval Equation works only for UNIMPEDED THROUGH-MOVEMENTS 8
ITE Yellow Change Interval Equation SHORTS THE YELLOW for UNIMPEDED TURNING-MOVEMENTS IMPEDED MOVEMENTS 9
General Form of a Standard Yellow Change Interval Equation ? ????= ???? 10
What is the equation for a turning vehicle that slows down with constant deceleration from the maximum allowable speed ?? at the critical point to the to ?? at the intersection? 11
What is the equation for a turning vehicle that slows down with constant deceleration from the maximum allowable speed ?? at the critical point to the to ?? at the intersection? ? ????= (??+ ??)/? 12
What is the equation for impeded movements and U-turns? ????= ??+?? ? 13
What else should ITE take from the physics tool box? 1.Engineering Tolerances for purposes of law enforcement 2.Acceptance of only Physical Solutions. Only physical solutions are engineering practices. Not Stochastic Solutions Not Analytic Solutions Not Misapplications of Physics 14
