I am usually as often as not on a tandem in traffic, and tandems only move forward and backwards a few inches once stopped. There is none of the "going up on the sidewalk and punching the walk button" or "jockeying over the sensor loop" or in any way doing much of anything once stopped. Most of the sensors in Portland have a bike symbol to position yourself over. I aim for it coming in to a stop. I'm pretty good at getting the front wheel right over the marks. Out in the suburbs, if a car eventually comes up behind us, we pull forward as much as possible. I then point to the sensor loop, point at the driver, and coax the (often) reluctant cager to move forward over it. If they refuse, we wait till the straight through traffic gets their green and we then turn left on the red arrow.