this bicyclist rode through a stop sign, past a right-turning car, rude and dangerous

this bicyclist rode past a right-turning car on the right side, without letting the car driver go first

I often see or hear the statement “bicyclists run stop signs all the time.” The person making the statement is not just making an observation, but trying to justify some attitude or action on their part, such as “bicyclists shouldn’t be on the road,” “bicyclists should be on the sidewalk,” “bicyclists should be thrown in jail,” “it is OK to intimidate or run over bicyclists,” or “we should not be spending any of our transportation money on bicycle facilities.”

I think that it is time for all of us to confront that statement and end its use. Yes, it is true that some to many bicyclists run stop signs. It is also true some to many motor vehicle drivers run stop signs. To refer back to my earlier posts on stop signs, stop signs are installed largely to reduce vehicle speeds and to get drivers to take turns at intersections. Bicyclists are rarely exceeding the speed limit, so that function is not served by the stop sign, nor by a bicyclist stopping. In the case of taking turns, the issue is taking turns, not the act of stopping. If a bicyclist does not stop at a stop sign, but no other vehicles are present which should go first, then the function of the stop sign to get people to take turns is intact, it has not been violated.

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I have noticed a lot of confusion in Sacramento amongst both transportation professionals and citizens interested in traffic calming about roundabouts. If you live, work or play in downtown and midtown Sacramento, you’ve seen a lot of structures in the intersections which people call roundabouts, but which are not, they are traffic circles. So what is a roundabout?

intersection conflict points

intersection conflict points

A modern roundabout is a structure that allows a free flow of traffic without stop signs. Instead, they use yield signs and markings. They are most appropriately used at street intersections where both streets are fairly busy. The biggest advantage of a roundabout, for all users, is the reduction of conflict points in the intersection from thirty-two to four, as illustrated in the diagram at right!

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California Walks tweeted an LA Times articles entitled Highway deaths at lowest level since 1949; bike, truck fatalities rise. The misinformation and misunderstanding in the article includes:

The article misses that the Traffic Safety Fact: 2011 Motor Vehicle Crashes: Overview (TSF), linked from the National Highway Traffic Safety Administration (NHTSA) press release, also shows that the injury rate per vehicle mile traveled (VMT) has been flat for three years. What does this mean? It probably means that the number of crashes has not declined, just the likelihood of fatality in a crash. The rate per VMT is the only useful measure of traffic safety. Fatality counts and injury counts are a mis-measure because they are affected by the rate of driving and a number of other factors, rather than the safety of driving.

The TSF provides counts of pedestrian fatalities, up 3%, and bicyclists (the NHTSA uses the obscure term pedalcyclists), up 8.7%. To go with the counting game, this is an increase of 130 dead pedestrians and 54 dead bicyclists in just one year. No statistics are presented on the fatality rate per bicycle mile traveled. Why? I believe that it is because NHTSA is too lazy or too disinterested to compile information on bicycle miles traveled. Though pedestrian miles traveled would be difficult to compile, at least a rate could be developed per pedestrian trip, which would be a more accurate measure of the rate of fatalities. Again, the NHTSA can’t be bothered. I am certainly not the first to point out that pedestrian and bicyclist fatality counts are a mis-measure of safety, yet the federal, state, and local governments continue to ignore the issue.

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