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From: "Michael R. Kesti"
Subject: Re: Smart traffic lights
Date: Sat, 04 Jan 2003 09:21:43 -0800
Organization: MK Associates
X-Mailer: Mozilla 4.7 [en] (Win98; I)
John Woodgate wrote:
>>An amazing number of
>>inductive loop detectors don't detect motorcycles.
>I wonder why. A large lump of aluminium crankcase would seem to be an
I believe that the problem is that they are not properly adjusted. Or
perhaps it would be more accurate to say that they are adjusted to avoid
false triggers while assuming that only automobiles will generate valid
I have twice complained to Caltrans about an intersection that failed to
detect motorcycles. The first time I was invited to meet one of their
"techs" at the intersection. He tweaked the detectors while I made
drove through and he was able to set things up to detect me. A few
weeks later, though, I found it again would not detect my MC. The
second call got me to a supervisor who told me that he rembered me and
the intersection in question, that the "tech" had set the sensitivity
too high resulting in false triggers, and that there was nothing they
could do short of digging up the intersection and replacing the loops,
which wasn't going to happen any time soon!
Michael Kesti | "And like, one and one don't make
| two, one and one make one."
email@example.com | - The Who, Bargain
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