I CAME ACROSS A study by Safe Kids USA that looked at distracted drivers in school zones. While it’s no surprise that distracted drivers are more likely to cause or be involved in an accident, some of the specifics noted in the report were surprising to me. For instance:
Fact. Drivers using a phone are as likely to get in an accident as drunk drivers ( .08 blood alcohol content).
Fact. Drivers dialing a phone are six times more likely to be involved in an accident.
Fact. Drivers texting on their phones are 23 times more likely to be involved in an accident.
Fact. Drivers talking on a phone are four times more likely to be in an accident.
Fact. Harvard Center for Risk Analysis estimated that in 2003, cell phone use was a factor in 636,000 crashes, 12,000 major injuries and 2,600 deaths.
But this post isn’t about bashing cell phone use. It’s about the impact of driving distractions in general and what we can do about it to increase pedestrian safety.
In the Safe Kids study, trained observers were posted in school zones located in 15 states throughout the U.S. They observed each car that passed through the school zone, making note of the drivers’ sex, the type of cars they were driving and any marked evidence of driver distractions. Of the 41,426 total drivers observed, about 7,000 of them (1 in 6) were distracted by something – eating, reaching in back, talking on a phone etc.
Specific findings include:
- Cell phone use was the number one leading distracter
- Men and woman drivers were abut equally distracted.
- Distracted drivers appeared more frequently in school zones without flashing lights.
- Drivers of SUVs, pickup trucks and other large vehicles tended to be distracted more than car drivers.
- Drivers not using their seat belts were 35% more likely to be distracted than those who did use seat belts.
Why does any of this matter? I suggest two reasons:
1. Distractions lead to more accidents as well as a higher severity of accidents when crashes do occur.
2. Traffic calming methods that interrupt diver distractions during critical times (such as while passing through school zones( are particularly important in reducing accidents.
As the Safe Kids report points out, a distraction that takes the driver’s mind off of his or her driving environment can have a huge impact on accident avoidance. By the time you calculate how long it takes for a driver to see a child run into the street, for the brain to process the situation and for the driver to make a decision on how to avoid the hazard, a car traveling just 30 mph will have traveled about 33 feet. Once you add driver reaction time and the time it takes the car to stp, it has now traveled about 104 feet from when the danger was first spotted.

From Safe Kids USA
That’s on a dry road…with clear conditions…without driver distractions. For each second that the driver is distracted, you can add another 33 feet to that stopping distance.
Radar speed signs, variable speed limit signs and violation alert signs are all bout refocusing a driver’s attention away from distractions and back onto his or her own driving speed and road conditions. And they work.
A variety of government studies show that radar speedcheck signs are one of the most highly effective means of reducing accidents in school zones, work zones and other places where pedestrian safety is of particular concern.
And now we know why.
If interested, you can find a nice collection of links to many of these government traffic calming studies at www.informationdisplay.com.