Johns Hopkins has reached a conclusion: to protect lives we need to narrow lives. Cars kill. Cars (and the people driving them) are more likely to cause death when they move fast and wide lanes encourage speeding. A logical step to curb reckless driving by car drivers is to limit the space they have to drive cars, and make the space they drive in more interesting. By narrowing lanes there are many benefits to be had by society at large. It’s good to see an institution like Johns Hopkins has figure out that car focussed design is not a good thing – streets are for people.
- Narrower lanes did not increase the risk of accidents. When comparing 9- and 11-foot lanes, we found no evidence of increased car crashes. Yet, increasing to 12-foot lanes did increase the risk of crashes, most likely due to drivers increasing their speed and driving more carelessly when they have room to make mistakes.
- Speed limit plays a key role in travel width safety. In lanes at 20-25 mph speeds, lane width did not affect safety. However, in lanes at 30-35 mph speeds, wider lanes resulted in significantly higher number of crashes than 9-foot lanes.
- Narrower lanes help address critical environmental issues. They accommodate more users in less space, use less asphalt pavement, with less land consumption and smaller impervious surface areas.
- Narrowing travel lanes could positively impact the economy. This includes raising property values, boosting business operation along streets and developing new design projects.