Sitting At Traffic Lights

Get in touch with the council and they can adjust the sensitivity of the sensor wires in the tarmac.
I did and low and behold never had the problem again

 

Or mount a big strong magnet under your bike, this triggers most under road sensors !! The wires use magnetic fields to sense mass (metal) as bikes are mostly aluminium (by mass) they don't always trigger the sensor ! As steel and iron are strongl magnetic field interuptors .

 

This!

My old SV650 was bad for this and some rare earth magnets stuck to the bottom of the frame with epoxy did the trick. It's amazing how many engineers assume everyone in the US is sitting in two tonnes of Detroit/everyone in the UK is sitting in a tonne of Dagenham and set the intersections up for that situation alone. Have a look on eBay - RE magnets are pretty cheap.

A lot of newer systems these days, over here at least, use motion sensors and I can trigger those without issue when I'm on my bicycle. Except they see you coming and assume you're doing 20-30 mph and go green way before you get to the line and you have to pedal furiously to get across before they turn back... First world problem though so I put up with it

 

eat more pies

 

Some of those magnets are scarily strong. Be careful or you will be picking up all sorts of ferrous debris from the road, or even getting yourself stuck to a passing bus...

 

And don't put them in range of your ECU or you'll be in real trouble

 

Once stopped at a light to take a left turn while another biker stopped to turn right...
But we both were short of that darned electronic loop in the tarmac...
And we were chatting along happily without the lights ever turning green
Until a car behind us honked and we moved a little ahead to hit the trigger...
Had us a good laugh