Portland has little blue LED lights that turn on when you are activating a sensor, which are also clearly marked, not to brag. 
Also, if you’re going to complain about the city spending money on these gadgets, you have no right to rant about cyclists ignoring red lights. The LEDs also help motorcyclists, who frequently have difficulty triggering signals.
Portland is also experimenting with painting bicycle symbols over a neon green background on the pavement above signal loops.
Joseph Rose: Green. Yellow. Red. Blue? Portland's new traffic-light experiment comes in peace (video) - oregonlive.com
