Don Kostelec Profile picture
Active transportation & healthy places planner. Road safety advocate. Avid walker since the age of 1. My opinions are my own.
Jul 26, 2018 16 tweets 5 min read
We have to get bureaucracies off their deadly fixation that 94% of crashes are caused by human error and thus the reason why fixing human behavior is the answer to traffic fatalities. It has created a barrier to real safety interventions in the US. Let's go threading... Since the 1930s we have used the "human error is the cause of crashes, thus the cause of deaths on road." This has been used to deflect attention away from safe systems approaches.

(Evans, L. 2004. Traffic safety, Bloomfield, Mich: Science Serving Society.)
Jul 5, 2018 11 tweets 4 min read
Here's an example we use in the Looking Glass Academy workshops on walkability to illustrate how pedestrian time/delay is not a factor in how highway agencies design a street. "Just go to the nearest crosswalk," they say. Let's look at it. I live where the red house is located and want to go to the grocery story. "Just go to the nearest crosswalk!" Well, there's a 1.15-mile gap between marked crossings where there are traffic signals with ped heads.