I solved the traffic lights' failure to detect my bike. I realized that my bike lacked enough steel to have its’ magnetic moment detected even if I ran into the middle of those detecting loops in the road. So I just happened to be at Industrial Liquidators on Convoy in San Diego, CA and found some of those incredibly strong little magnets, there was one that looked like a side slice from a cylinder and weighed about 1/3 ounce, 9 gms. I bought two, $5 each, one for each bike, and put them nearer the back on the chain stay opposite from the chain side – to prevent magnetizing my chain, bottom bracket bearings or rear hub bearings. I have never failed to be detected by a traffic light since that day, and as a result speeded up my commute.