Same here, but CA. I thought I read something about having to wait through at least one full cycle...or an exceedingly long period of time...but I can't find it now.

One trick I know that works on empty stoplights in to push the crosswalk button to trigger the light change. Then I just get back in the street and proceed on my way. This gets annoying to me though so I changed my route that has a more steady flow of traffic.

Unfortunately, that doesn't work for many left turns.

I had complained to the town (Shrewsbury, ma) about a sensor not detecting my bike. They were very nice about it and had an engineer meet me at the offending intersection to adjust the sensor. After making the adjustment he also instructed me that the best place for me to put my front tire is right on one of the corners of the cut in the road where the sensor is placed. This light works for me every time now.

Curious, wonder how this "adjustment" works?

Not quite right.

And not quite complete.

Colorado State law says

I don't think that Colorado law is unique either. There is probably something on this in the Uniform Vehicle Code which is used to standardize regulations throughout the US.

This is how I proceed at the problem intersection is question. The municipality in question has received numerous complaints about the light but have failed to act. Even with their failure to act, I stop at the light and proceed as above for several reasons. First, I stop at lights. Second, this intersection is a very complicated multi-lane road with lots of people driving stupidly. Third, I don't need a ticket or to get squished.

The loops work by detecting changes in the current when a conductive material passes through the magnetic field of the loop. They can increase or decrease the level of detection by increasing or decreasing the amount of current change detected. Traffic engineers don't want to set the sensitivity too low or they will detect cross traffic and the light becomes just a timed light. If they set it too high, it won't detect smaller objects. We cyclists are those smaller objects.

So putting my cleat right on the pavements cut line seems to trigger and almost instant change!

Just one more reason to continue to ride clipless on my commuter. I'll have to try that at some of the stubborn lights on my commute. I've been sick all week, so I haven't been riding to work lately.