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streets to being streets that are more in out of the way areas and we all agree movement of these thousands of vehicles a a day has to be done in a safe matter and how to achieve that and we don t want to do things to arterials that would encourage people to use other streets so if we effect arterial traffic. speeding can also vary depending on the time of day so even talking about streets being congested during the day there may be times when they are relatively empty ier and that s a situation where you may have speeding at night on weekends or during the middle of the day. as megan and others have talked about the city now has a map where we ve concentrated the highest injury streets and if you look at this map and compare with the arterial map you will see a big overlap and that s a function of the fact it s more likely for people to get into collisions on these major streets by the fact they are carrying so much traffic and have a lot of bicycle and pedestrian acti ....
are going fast it s more likely that the red light running and speeding i think is the critical factor in causing collisions and also in the severity of the collisions. so how do we approach arterial traffic calming? we basically want streets not to have the characteristics that will make speeding attract ive so that means primary traffic signals or other types of devices to make sure vehicles are controlled in that way and streets have an appropriate number of traffic lanes as narrow as possible and there s a lot of research that narrow traffic lanes can be one tool to help slow down traffic and design streets to be attract ive to all modes. this is a picture that was a 6 a 6 lane street as you can see there was not even any medians and kal trans department went in there and these are the kind of situations where you have very low traffic volumes and 6 lanes of traffic there s no traffic controls to stop you and those are the kinds of situations we re trying to to ad ....
to mention the example of geary boulevard which is a major 6 lane arterial in a commercial core area between masonic avenue a high commercial area one of the examples of a street that has a a lot of transit and pedestrian activity. and what we ve done over time is to signalize all of the uncontrolled crossings so not only are there more controls to control the traffic speeds but the likely hood of pedestrians or motorists being hit decreases so as you can see there were a number of scene of scene of intersections that were not signalized. and we ve been able to fix those issues and now in the process of signalizing one of the last two locations at 26th and 22 nd avenue and if you look at the fulton corridor again that cordon is not as commercial but it does have a lot of residential activity and that s an area where we probably need to go in there and do more traffic controls and to install additional traffic signals on fulton. sunset boulevard is another example of a c ....
the arterial map you will see a big overlap and that s a function of the fact it s more likely for people to get into collisions on these major streets by the fact they are carrying so much traffic and have a lot of bicycle and pedestrian activity so there s a large overlap and over all injury maps and the arterial network in the city and unsafe speed i d like to emphasize if you are speeding you are more likely to run a red light or be unable to yield to a pedestrian or lose control of your vehicle in a situation where somebody else is trying to turn and so forth so speeding is not just by itself it s probably behind a secondary or third factor behind most collisions when you are going slower you can react to unanticipated things in a better fashion and there s also the fact that all of these collisions can be can be non injury or fatal and when you are going fast it s more likely that the red light running and speeding i think is the critical factor in causing collisi ....
june 12, 2014, transportation authority board special meeting vision zero committee the meeting of the san francisco transportation authority vision zero committee. i m kim yee and breed and march and scott wiener on their way to the meeting. we would like to thank jessie larson and jennifer lowe and our clerk erica cheng. are there any announcements? no announcements. role call. breed, present, kim, present, mar, present, wiener, absent. yee, present, we have a quorum. thank you. can we call the next item, please. item no. 2, approve the minutes of april 10th #shgs 2014. can we have a motion? we have a motion and second? any public comment on this item? seeing none. we have a motion and second. can we do that without opposition. i will have to take a roll call. commissioner breed, aye, kim, aye, yee, aye, wiener absent. item no. 36789 -vision zero progress report and achieving vision zero information. thank you. we have megan wier ....