Originally Posted by
zacster
How do these things work with carbon fiber bikes and wheels? Do they work at all?
In NYC we don't have many of these so it isn't much of a worry.
I am a traffic engineer by trade - detector loops work by inductance, i.e. ferrous metals cause a change in the inductance and "tell" the signal controller that there is a vehicle there. If you are riding an all-carbon bike, you are SOL as far as ever getting a loop to detect you.