Today's "What Gets My Goat" - NO POLITICS!

[Grahamm]

So are they pressure or magnetic - either way they sometimes dont work and my antics seems to get them to

They work by induction, a bit like a metal detector. I've had the same problem with ones in combined bus and cycle lanes because there just isn't sufficient metal on a bicycle to trigger them all the time. If that happens, I'll stop and if the lights cycle more than once without mine changing I'll treat it as a Stop sign and proceed with caution.

Here's a bit about them, although I don't guarantee its techniques will definitely work! http://www.wikihow.com/Trigger-Green-Traffic-Lights