Traffic sensors - we all know they're normally just a buried loop in the street.

Triggered by a mass of steel over them changing the resonant frequency thus indicating a vehicle is present. Presents a pain for most motorcycle riders as they are not sensed.

Ton of places selling magnets that supposedly help but I say not, that isn't going to change the frequency of the loop aside from having a bit more ferrous metal closer to the loop.

My opinion is a turn or two (or more) turns of wire soldered into a shorted turn then mounted underneath.

Remember most of these bikes are mostly aluminum with a minimal steel frame.

Yea, we've got "legal to run" laws in most states but usually only after 2 - 3 minutes have past but not everywhere, some have to dismount and go press the crossing button for pedestrians. Dangerous.

Let's start this out as a Q & A idea.

Just looking for opinions

 

Wonder if the freq could be sensed, inductively, then retransmitted at an off frequency (using the same coil).

If the frequency was standard even simpler.

 

I'm sure I saw a circuit that someone claimed worked but I can't find it. I came across this which might help if you can see the cutout for the loop:
http://www.humantransport.org/bicycledriving/library/signals/detection.htm

 

Problem solved !