Don Kostelec Recent Posts STREETSBLOG USA The 94% Error: We Need to Understand the True Cause of Crashes By Don Kostelec | Oct 14, 2020 | No Comments You’ve heard the claim that 94 percent of crashes are due to human error. Traffic safety campaigns are grounded in it. Agencies are using it to advocate for autonomous vehicles. But simply put: It’s not true. STREETSBLOG USA The Small-City Vision Zero Challenge By Don Kostelec | Sep 23, 2019 | No Comments Smaller cities with limited budgets present particular traffic-safety problems. Here's how some transportation planners managed the issues.