Except that in the example above, it's just 5 km/h difference between a full stop and the rolling cross on the green light. That 5 km/h is reached in a few pedal strokes. Also, 25 seconds rest isn't to be frown about. And to the post after yours, indeed, I switched gear and also replaced my 52 teeth chainring for a 46 teeth (I stop and go more often than go at 50+ km/h during my commute so a 46 is better for me than a 52) to have better torque when starting in my 24 teeth cog without having to change chainring. Last time I fell clipped was actually because I concentrated on a car parked near the curb and forgot to change gear. When I pushed on the pedal to start, bike fell instead of moving forward