Another Red Light Camera Malfunction: Yellow Light Tickets

It’s an old article, but the content is still valid. There were a couple of lines that are relevant to recent posts.

In this article, a guy gets a red light ticket showing both the yellow and red lights on at the same time. This is not surprising, we’ve seen these malfunctions before.

This line was the most interesting:
According to a report by the California State Auditor, about four out of every five red light camera citations in the state were issued for split-second violations. Shorter trigger settings or “grace periods” allow jurisdictions to collect more revenue because the greatest number of technical violations occur within the first 0.25 seconds after a light turns red, according to a Texas Transportation Institute study. Ticketing such violations has little impact on safety as the same study showed the probability of a right-angle collision within a split-second after a signal changes from yellow to red is almost zero at an intersection with a protected left turn lane. “Given a 1.0-second all-red interval, the probabilities also suggest that crossing through vehicles will not start to enter until after about 4 seconds have lapsed,” the Texas study explained (page 99).

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One Comment

  1. stephen white
    Posted July 10, 2009 at 3:04 pm | Permalink

    was caught by the yellow to red trap.recently and plan to fight5 it.


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