What do you do when at a stop light and your bike doesn't trip it?- Mtbr.com
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  1. #1
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    What do you do when at a stop light and your bike doesn't trip it?



    Quote Originally Posted by CommuterBoy
    I don't mind waiting for someone else to trip the light. When I stop at a light I'm usually taking a dump in the middle of the street anyway, so it buys me some time.
    :wq

  2. #2
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    Sorry, CB, I had to
    :wq

  3. #3
    ~Disc~Golf~
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    critical gass
    Honestly... ahh I give up

  4. #4
    iRonic
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    Wait for a police escort!
    Ron

  5. #5
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    Bike cities with inductive loops. But sure to have hubs parallel to saw cuts in road where loop wires are imbedded.

    In this fasion, I trip lights with my carbon fiber road bike.
    Just get out and ride!

  6. #6
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    Indiana did not pass the new bike law that would have allowed bikes to proceed (yielding to cross trafffic) after stopping at a red light when the signal is controlled by an inductive coil. So the problem was officailly recognized but the law was not changed to prevent the cyclist from being ticketed. Figures.

    The sensitivity can be changed on these lights in many cases. My steel bike does not register on either of the two lights I frequently use. The problem arises with Sunday rides when traffic density is low so there is no car either behind or across the intersection to trip the light. I have found no orientation of the bike I have tried makes any difference, though I will try again. The BB shell and crank spindle are about a pound of steel and as close to the coil as any part of the bike.

    I know the one light cycles in 90 seconds from the time a car arrives, if if has recently cycled and the main traffic is moderate to heavy. It is shorter if it hasn't cycled in a while.. The second light is 120 seconds. So when that time has passed, I wait for a clear break and go. Usually a car arrives before that. The chances of getting the sensitivity turned up? Slim to none. So I just make sure I'm not doing it in front of a law enforcement person. Since some cyclists ignore these lights completely and turn them into a yield, and motorists hang a right without a stop, an enforcement on a cyclist who stopped then proceeded when they did not trip, would be unequal treatment.

  7. #7
    Bedwards Of The West
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    I was going to come in here and quote myself, but apparently there's no need.

    In reality, I just ride in places where there are no lights. 3 years in LA county was enough for a lifetime. I prefer 'deer crossing' signs to stoplights any day.
    You have no excuse for driving to work
    (unless you don't have studded tires)
    (no excuse for that either)

  8. #8
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    There's one light on my commute that does not recognize a bicycle, ever, no matter what. I only slow down enough to make sure I won't get run over by cross traffic, and go.

  9. #9
    Mantis, Paramount, Campy
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    Here too

    Quote Originally Posted by mtnbean
    There's one light on my commute that does not recognize a bicycle, ever, no matter what.
    Sometimes I could take a nap there.

    What's even more annoying is that all 4 sides of the intersection are independant. There can be an oncoming car that gets a green light but I'll still be stuck there.

    The longest I've had to wait there was about 7 minutes.

    Thank goodness I dont get to the light much before 6am.
    *** --- *** --- ***

  10. #10
    Ovaries on the Outside
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    One thing to try is to lay your bike down across the coils. It puts a lot more mass a lot closer to the coil.

    On lights that I can't trigger (this happens to me on my motorcycle, too) I let a cycle of lights go by and then I burn through the intersection, but since I live in Oregon, those intersections are pretty few and far between.

  11. #11
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    Usually, I wait for a car to come up behind me. If that doesn't happen, I use a crosswalk.

  12. #12
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    I used to be a NYC bike messenger back in my college days....I haven't changed a phreaking thing since those days when it comes to urban cycling, and I still don't wear a helmet....catch me if you can is my motto.

  13. #13
    M8 M12 M15 deez nuts
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    Quote Originally Posted by nachomc
    What do you do when at a stop light and your bike doesn't trip it?
    I wait for a bit. But if the light still does not change, I wait for the cross traffic to cease, and then I sprint through the light. Normally I am a “good boy” and wait for the traffic signals to sort things out, but several of them so it seems have sensors that only like big heavy cars with lots of metal mass. The going joke on my road bike group rides is that there are too many weight weenies with carbon frames, and “that’s why the signal isn’t changing”.
    Don’t frail and blow if you’re going to Braille and Flow.

  14. #14
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    I actually find the idea of sitting at a red light for an indefinite amount of time when I can clearly see that there isn't any cross traffic in either direction to be completely absurd. By doing so I feel as if I am giving the light credit for being able to make a better decision about my safety than I can (I don't assume that a green light means that I am safe either). I do have one light on my commute to work that isn't tripped by my bike and has extremely low traffic (especially at 6:30 AM when I usually pass through there) so if I were to wait for a car, it could be a while. Coincidentally, that light just happens to be about 400 yards from the local county police station so there is plenty of LE traffic in the area. What I do is stop, check to make sure that it is clear in both directions, and then I proceed. I have had a police officer slow and wag his finger at me as he passed but no tickets to date.

  15. #15
    weirdo
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    Quote Originally Posted by 29Clyde
    By doing so I feel as if I am giving the light credit for being able to make a better decision about my safety than I can
    Doh! You`ve made me feel like a total Slave To The System! I don`t think I`ll change my method, but I`ll certainly feel more stupider about doing it "my" way from this day on!

  16. #16
    M8 M12 M15 deez nuts
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    Quote Originally Posted by 29Clyde
    I do have one light on my commute to work that isn't tripped by my bike and has extremely low traffic (especially at 6:30 AM when I usually pass through there) so if I were to wait for a car, it could be a while. Coincidentally, that light just happens to be about 400 yards from the local county police station so there is plenty of LE traffic in the area. What I do is stop, check to make sure that it is clear in both directions, and then I proceed. I have had a police officer slow and wag his finger at me as he passed but no tickets to date.
    The ones I have a problem with CLEARLY have the assumptive “put your bike here” markings so as to lure you into thinking putting your bike there will put you into the traffic queue. Clearly someone did not adjust the sensitivity of the sensors, as my 24" x 2.5" Surly Large Marge rims do NOT trip the freakin’ sensors. Just two intersections of my normal work commute. Every other intersection seems just to be working fine.
    Don’t frail and blow if you’re going to Braille and Flow.

  17. #17
    El Pollo Diablo
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    Thankfully, my commute is early enough (clock in at 5:15) that there's little traffic...
    nobody around = run that sucker like it aint no thang

  18. #18
    Drinking the Slick_Juice
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    has anyone one tried an electromagnet setup and the BB? Ive heard stories of motorcycles using electromagnets to set off the light im just not sure if it works
    "If women don't find handsome , they should at least find you handy."-Red Green

  19. #19
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    Here as far as I know (MN) if the light does not change after two cycles you can go, this is usually how I take it. Or I hit the crosswalk button.
    Mr. Krabs: Is it true, Squidward? Is it hilarious?

  20. #20
    Frt Range, CO
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    Quote Originally Posted by nuck_chorris
    has anyone one tried an electromagnet setup and the BB? Ive heard stories of motorcycles using electromagnets to set off the light im just not sure if it works
    I think this is a myth.

    Quote Originally Posted by Mr Pink57
    Here as far as I know (MN) if the light does not change after two cycles you can go, this is usually how I take it. Or I hit the crosswalk button.
    If it never changes, what time frame is two cycles?

    I stop and wait for a hole in traffic on some roads. One of my intersections has so much cross traffic and none in my direction, I have to use the pedestrian button.

  21. #21
    weirdo
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    Quote Originally Posted by Leopold Porkstacker
    The ones I have a problem with CLEARLY have the assumptive “put your bike here” markings so as to lure you into thinking putting your bike there will put you into the traffic queue.
    What? I wish they ALL had those markings. If they did, this whole thread would be moot. Unfortunately, I`ve never seen an intersection marked that way except in pictures on the internet.

  22. #22
    weirdo
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    Quote Originally Posted by pursuiter
    I think this is a myth.


    If it never changes, what time frame is two cycles?
    My guess is myth, too.

    Yeah, some intersctions stay green for a single direction until somebody triggers an "otherwise" sensor. The only ones you can watch cycles on are the kind that hit all the straights travel lanes and only use sensors for turn arrows.

  23. #23
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    Under Indiana law, a malfunctioning traffic light can be treated as a full stop.

    If my usual lights do not trip in their usual time, then the sensor has not responded to me, and the light is malfunctioning as far as I am concerned. I treat it as a stop. Not sure the bone headed local LE would appreciate the subltely of the point about malfunction but that's a bridge I may never need to cross.

  24. #24
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    Here's the appropriate traffic code for Wisconsin:

    Red Traffic Signal: [346.37(1)(c)4] allows a bicyclist facing a red signal at an intersection, after stopping as required, for not less than 45 seconds, to proceed cautiously through the intersection before the signal turns green if no other vehicles are present at the intersection to actuate the signal and the operator believes the signal is vehicle actuated. The bicyclist shall yield the right-of-way to any vehicular traffic when proceeding through the green signal at the intersection.

  25. #25
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    So in terms of inductive loop technology (that's the vehicle sensors in the pavement)

    If you take a coil of wire approximately 12" in diameter loop, then that will be sufficient to disrupt the electromagnetic field the loop wires generate. I've tested this with hit or miss success. I've used shovel heads to find detectors imbedded in the pavement under the final lift.

    What I have done with my carbon fiber bike, is to be sure to align my bike completely on one edge of a 6'x6' square loop. For a 6' dia circular loop, I put my front hub over a saw cut and the rear hub over the saw cut. So about 1/3 off of center of the circle (either left or right, doesn't matter). Then I turn my front wheel in line with the saw cut to have the spokes hitting the field.

    In this fashion, I can trigger all 90 traffic signals we have here in Redmond, WA.

    We are working with the cycling community to have old detector cards replaced with newer ones that tune better when we have cyclists complain of lack of detection and then I can't detect my own bike on it after turning up the sensitivity. The newer cards seem to be more sensitive without picking up adjacent lane information or interfering with other loop fields.

    Our cycle lengths vary from 80sec to 150sec. But the state and county signals can go up to 240+sec. But those are typically at larger intersections with high speeds and may not even have detectors.
    Just get out and ride!

  26. #26
    smell the saddle...
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    I slow down at all lights & stop signs long enough to look both ways and GO! None of the lights here have sensors anyway.

  27. #27
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    Pedestrian crossing button. If none are available, then right turn, U-turn, right turn (or variation of that, as appropriate to where I want to go). Not sure how what the laws are here for traffic lights not changing for cyclists.

  28. #28
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    There was an instructable (I think) about this. They said to tape a couple of rare earth magnets (Neodymium) to the BB. Magnetic lines had go left and right not in-line with the bike. And that would trip the sensor. I haven't tried it yet. But it sounds good.

  29. #29
    weirdo
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    Quote Originally Posted by bikedreamer
    Pedestrian crossing button. If none are available, then right turn, U-turn, right turn (or variation of that, as appropriate to where I want to go). Not sure how what the laws are here for traffic lights not changing for cyclists.
    Twp good ideas to keep in mind. I don`t like either method, but sometimes it`s just the best way to get the job done.

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