I noticed that the traffic light sensor at the bottom of Pitsligo Road has a couple of LEDs on it (red and green). As I approached they seemed to go through some sequence before settling on the green LED being lit.
This didn't correspond to the lights going green but did seem to indicate that I had been picked up as I got my turn after E/W traffic on Newbattle had cleared.
Maybe these are more widespread and I just haven't noticed, but for a cyclist they are extremely welcome feedback in my opinion.