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Thread: Wow, it works!

  1. #1
    In beaurocratic limbo urbanknight's Avatar
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    Wow, it works!

    So the SFVBC had a warning out that cops in Agoura and Simi are cracking down on traffic violations (both vehicles and bicycles), and mentioned that turning on a red arrow just because it won't change isn't necessarily legal. They recommend (if you have a steel bike) finding the sensor and swaying your bike back and fourth across it. I tried this at a light today when no cars were getting behind me and I think it worked! I might have found a new reason to stay with steel forever!

  2. #2
    riding once again jschen's Avatar
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    I've had pretty good success activating traffic signals with my bike despite a minimum of steel on the thing. Parking right over the edge of the sensor often does the trick. Extort has shown me how having a tire physically on the sensor often works, too. (Perhaps even better than trying to get what little ferrous material I have over the edge of the sensor.) I don't have a 100% success rate between those two methods, but it works most of the time.
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  3. #3
    In beaurocratic limbo urbanknight's Avatar
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    Cool, by edge do you mean the edge closest to the intersection?

  4. #4
    riding once again jschen's Avatar
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    You usually can see an outline of the sensor on the road. You get right on the edge of that outline--doesn't matter which edge--rather than in the middle of the sensor. The sensors are tripped by minute changes in the electrical currents running through them. So putting a ferrous part over the edge can do the trick. Manipulating the current by pressing a tire against the sensor can do it, too.
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    Scum, Freezebag! Mo'Phat's Avatar
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    I just carry a 10lb magnet in my shorts.
    Mo'Phat's Rules to Live By:
    Rule #3 : Never wrestle with a pig: you both get dirty, and the pig likes it.
    Rule #5 : Never argue with an idiot: those watching might not be able to tell the difference.
    Rule #13: Always make sure she has a better time than you do.

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    Senior Member bitingduck's Avatar
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    It doesn't have to be ferrous-- just conducting. The sensors will produce eddy currents in an aluminum rim and detect the resulting fields.
    Track - the other off-road
    http://www.lavelodrome.org

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    got the climbing bug jsigone's Avatar
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    some lights are more stubborn then others

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    OCP-Poseur...
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    When making a right turn if its not changing for me, or when theres a lot of oncoming traffic, ill just hop in the cross walk from the right turn lane then cross when the light changes and continue...

  9. #9
    riding once again jschen's Avatar
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    Quote Originally Posted by bitingduck
    It doesn't have to be ferrous-- just conducting. The sensors will produce eddy currents in an aluminum rim and detect the resulting fields.
    Okay... that makes a bit better sense.
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  10. #10
    Whateverthehell Chucklehead's Avatar
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    Quote Originally Posted by Mo'Phat
    I just carry a 10lb magnet in my shorts.
    yeah, me too. a 10lb chick magnet
    "When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return." - Leonardo daVinci

  11. #11
    riding once again jschen's Avatar
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    Quote Originally Posted by dog hair
    yeah, me too. a 10lb chick magnet
    Where can I get one of those? Does Performance sell them?
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  12. #12
    Whateverthehell Chucklehead's Avatar
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    haven't seen them at performance. not that i've looked or anything...
    "When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return." - Leonardo daVinci

  13. #13
    Powered by Borscht ovoleg's Avatar
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    Quote Originally Posted by bitingduck
    It doesn't have to be ferrous-- just conducting. The sensors will produce eddy currents in an aluminum rim and detect the resulting fields.

    Thankfully I just took an electromagnetism course last quarter so I understood what you said...lol

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    ... Brandy's Avatar
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    Quote Originally Posted by dog hair
    yeah, me too. a 10lb chick magnet

  15. #15
    ... Brandy's Avatar
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    Someone posted this at TE a while back...

    http://www.humantransport.org/bicycl...nals/green.htm

  16. #16
    Powered by Borscht ovoleg's Avatar
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    Where exactly is the sensor???

  17. #17
    Senior Member thomson's Avatar
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    If there is a particular intersection where the light won't trip, you can contact the city to adjust the sensitivity.

  18. #18
    Scum, Freezebag! Mo'Phat's Avatar
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    Quote Originally Posted by jschen
    Where can I get one of those? Does Performance sell them?
    Hi-Tech Bikes has them...strangely, in their "Ultra-Lightweight Parts" section. Odd.
    Mo'Phat's Rules to Live By:
    Rule #3 : Never wrestle with a pig: you both get dirty, and the pig likes it.
    Rule #5 : Never argue with an idiot: those watching might not be able to tell the difference.
    Rule #13: Always make sure she has a better time than you do.

  19. #19
    hello roadfix's Avatar
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    ...or get one of these.
    .cinelli.olympic.surly.long.haul.trucker.kona.ku.surly.steamroller.
    .litespeed.classic.litespeed.firenze.bianchi.pista.dean.colonel.plus.more.

  20. #20
    Senior Member devilinblack's Avatar
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    Quote Originally Posted by The Fixer
    ...or get one of these.
    The problem with that is that most cities around here don't have the sensors. According to a cop I know, Buena Park is the only city in OC that uses them.

    I recently asked a Cypress cop if I was likely to get a ticket for blowing red left turn arrows and he told me that none of the guys he knows would bother. Only reason I asked was because I was about to run the light when I saw him coming up behind me, so I stopped.
    -stephen



    "And miles to go before I sleep." -Robert Frost

  21. #21
    In beaurocratic limbo urbanknight's Avatar
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    Quote Originally Posted by ovoleg
    Where exactly is the sensor???
    You'll see a circle or an octagon in the asphalt, the outline being a crack or rubber strip. The light I tried this on actually has 3 of them, probably to tell how many cars are waiting.

    Quote Originally Posted by Mo'Phat
    I just carry a 10lb magnet in my shorts.
    Oh, so THAT'S what that was. The gals will be disappointed.

  22. #22
    Desert tortise lsits's Avatar
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    I put my chainring directly above the outline of the sensor. Works about 80% of the time.
    Wish I didn't know now what I didn't know then. - Bob Seger

  23. #23
    [Tak962]
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    Cool Greg Moore tribute video. The good old days of CART.

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