Given how roads are designed, speed limits set, and crosswalks placed, I have to agree with Dumbaugh when he calls road engineering a "fraud discipline".
Why is it so bad? One cause might be education. The majority of traffic engineering programs in the U.S. "do not have a single course that covers the issue of road safety".
One study found that less than 25% of programs said they offered a safety course, and of those, a third didn't actually offer one.