"I used the legal “complete stop” threshold for determining whether behavior qualified as stopping or not. As I tallied up hundreds of commuters, this standard revealed itself as less and less useful when comparing cars and bikes. Because of their slower overall speed, bike riders have just as long, if not longer, to approach an intersection, observe the participants and determine whose turn comes next. For the most part, they slow down sooner and move slowly for longer as they evaluate the timing and safety of crossing. Rarely does this require a complete stop. When a bike rider does make a complete stop, it takes longer for her to get started again than it does for someone driving a car.
As drivers, we approach intersections faster, decelerate later and faster, and spend less time gathering data about the likely traffic pattern. We are also able to accelerate quicker when we start up again.
Because of these dramatic differences in auto travel speed, acceleration and deceleration, when a car driver approaches a stop sign and rolls through without actually coming to a complete stop, it looks more like a stop than when a person does exactly the same thing on a bike. I wondered if police officers are able to overcome this optical bias.
Experienced Portlanders, whether behind the wheel or on the saddle, probably agree that not stopping can often be the most courteous thing to do at intersections. If done safely, it allows the next intersection participant to make their move sooner. “California stoppers” in cars and on bikes tended to treat the other vehicles as respectfully as traditional stoppers, and, I like to think, made the entire interaction more efficient.”
read more: bikeportland, 05.06.14.
there are two infamous traffic circles in portland, and they both have stop signs before entering the traffic circle, which totally defeats the purpose of traffic circles / roundabouts!