The only thing that ever really slows me down consistently is traffic & !%$#@# drivers that cut me off or make illegal moves so that i have to slow or stop or wait for another cycle at a light. People that pull way in front of the stop line also screw u the traffic light senors in the road, creating headaches for multiple parties. I've ridden one particular route in all kinds of weather, with or without groceries, and the traffic volume & pattern is always always always the main, if not singular variable in determining trip time.

Perhaps you could try being a bit more assertive & see if you can shave a bit of time off while not inciting motorist ire?

- Andy