Showing posts with label National Sleep Foundation. Show all posts

Road Safety and Drowsy Driving

Posted by Unknown in , , , , , , , , on Thursday, November 7, 2013

Each year, Drowsy Driving Prevention Week (DDPW, Nov. 3-10, 2013) focuses national attention on the significant threat posed by motorists who get behind the wheel while extremely tired. As we’ve discussed previously on this blog, our research shows that roughly one-in-six fatal crashes involves a drowsy driver. And, according to new survey data released this week from our latest Traffic Safety Culture Index, just about everybody thinks it’s unacceptable to drive when you’re having a tough time keeping your eyes open, but a substantial number of people do so anyway.

While we generally discuss drowsy driving within the context of our safety culture research, this week presents a valuable opportunity to highlight how this priority concern relates to another of our focus areas: road safety. Within the realm of traffic safety more broadly, “road safety” refers to the engineering and design features, maintenance, and operating conditions of the road network itself, including roadways and the roadside environment. Our research on pavement edge drop-offs, which examined how the design and construction of the road edge can influence certain types of crashes, is an example of this area of study.

But how can engineering considerations and road safety relate to drowsy driving? A common road safety principle is that a roadway should be forgivingof driver error. This means that the design of a road can help mitigate crash severity, or, even better, prevent crashes from happening in the first place. Installing rumble strips, for example, can prevent a drowsy driver from having a run-off-the-road crash, as the noise and vibration they cause are designed to jolt drivers back to attention. Similarly, median barriers – such as cable guardrail or jersey walls – can serve as a last line of defense for a drowsy driver by preventing or mitigating cross-over, head-on collisions.    

Our flagship effort to improve road safety across the country is the United States Road Assessment Program (usRAP), an operating program of the AAA Foundation. usRAP provides highway authorities a simple but robust way to make data-informed decisions for the safety of the motoring public. Using a video log of a roadway, for example, usRAP can analyze the engineering features of a given segment, assign a star safety rating (similar to the safety ratings commonly used for evaluating vehicles), and generate a safety investment plan to reduce the risks identified.

This week, in addition to commemorating DDPW, we were very pleased to celebrate the achievement of the Genesee County Road Commission in Michigan, which won a 2013 National Roadway Safety Award for utilizing the usRAP protocols to generate a county safety plan with an estimated benefit-cost ratio of 2.3. The Award was presented by the Federal Highway Administration and the Roadway Safety Foundation at a luncheon on Capitol Hill, with GCRC and usRAP staff in attendance.

While usRAP provides a valuable tool for the highway agencies nationwide that are responsible for building and maintaining safe roads, it is up to each of us as motorists to ensure that every time we get behind the wheel, we are prepared to use those safe roads safely. This requires being awake, alert, attentive, and sober – always. And at the AAA Foundation – which recently again received Charity Navigator’s coveted 4-Star rating – we’ll continue in our mission to provide the science and tools needed for drivers, highway authorities, and others to move Toward Zero Deaths on our roads.

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THE DRIVING DANGER THAT YOU’RE IGNORING

Posted by Unknown in , , , on Thursday, January 26, 2012


by Carole Jackson
Bottom Line’s Daily Health News

Would you let a friend get behind the wheel of a car if he’d just been drinking and wasn’t steady on his feet? The answer is certainly "No." But if you’re like most people in the US, you wouldn’t hesitate to let a friend drive when he’s incapacitated for another reason -- drowsiness. It’s time to wake up to a danger that causes nearly 5,500 deaths a year.

Surprisingly, drowsy driving has gotten little attention compared with other driving dangers, including speeding, drinking alcohol, failing to fasten seat belts or being distracted by cell phones and other devices. That’s why AAA’s recent campaign against drowsy driving caught my attention.

I phoned J. Peter Kissinger, head of the AAA Foundation for Traffic Safety, who told me that, in his opinion, drowsy driving is the largest unrecognized problem on the highways. In a recent AAA survey of 2,000 drivers age 16 and older, 32% said that they had driven while on the verge of falling asleep at some point in their lives, and 41% admitted to actually falling asleep at the wheel at some point in their lives. And that’s despite the opinion of 96% that it’s unacceptable to drive while drowsy! So why don’t we practice what we preach?

BELTS, BOOZE AND SPEED

The 96% have it right. According to the National Sleep Foundation (NSF), drowsiness is very similar in its effects to drunkenness. It causes slower reaction times, vision impairment, lapses in judgment and delays in processing information. In fact, NSF, which has joined AAA in publicizing the problem, says that being awake for more than 20 consecutive hours results in impairment equal to that caused by a blood alcohol concentration of 0.08%, which is the legal limit for driving in all states. And if you’ve undergone stress or slept poorly the night before, you don’t have to be awake for even that long to experience this level of impairment.

So why are we just now learning about this? As Kissinger put it, traffic safety experts have focused on "belts, booze and speed" and more recently on distractions by cell phones and other electronic devices. Also, statistics, he said, have downplayed the role of drowsiness in fatal crashes because it’s often difficult for investigators to determine if the cause of a crash was drowsiness, drunkenness, distraction or a combination of factors -- in other words, there’s no breathalyzer or blood test for drowsy driving. If a driver veers off the road and hits a tree, for instance, there’s often not any way to tell whether he fell asleep or instead was distracted when he tried to change the station on the radio.

As a result, US traffic statistics typically show that drowsiness is involved in only about 3.6% of fatal crashes, compared with more than 30% for alcohol. AAA has now recalculated the statistics by extrapolating data from accident reports and adjusting for unknown or missing data (like drowsiness). New calculations, Kissinger said, show that nearly 17% of fatal car crashes result from drowsy driving -- that’s on a par with distracted driving, which is thought to account for 16% of crashes. Plus, he added, 60% of people who "nod off" at the wheel do so when driving for less than one hour. "Drowsy driving doesn’t just occur on a long trip," he said. "It can also happen on a shorter trip, such as driving home after a date night with your significant other."

YOUR STRATEGY FOR SAFETY

To prevent an accident caused by drowsiness, Kissinger urges us to...
  • Take a 30-minute break from driving every two hours or 100 miles to drink coffee or another caffeinated beverage. It takes about 30 minutes for caffeine to enter the bloodstream.
  • Sleep at least seven hours the night before a long trip.
  • If possible, travel with an alert and well-rested passenger who will help keep you awake.
  • Stay somewhere overnight instead of extending your drive time beyond the length of your typical day.
In addition, he said, besides the obvious case where you have trouble keeping your eyes open or your head up, you are too sleepy to drive when you...

  • Can’t remember how far you’ve traveled or what you’ve recently passed.
  • Find yourself tailgating or drifting out of your lane.
  • Daydream or have disconnected thoughts.
  • Often yawn or rub your eyes.
  • Miss signs or drive past your exit.
  • Veer off the road and hit the rumble strips on the shoulder.
  • Have to blast the radio and/or roll down the windows in an attempt to stay alert.
What can you say to friends who insist on driving drowsy? Try to talk them out of driving, and if possible, offer to drive them where they're going. If that fails, take away their keys, and don’t be afraid if they become angry. They’ll likely thank you later on, Kissinger said, especially after you mention the statistics on fatalities caused by drowsy driving. A look at the stats will tell them that you may have saved their lives. 

Be well,

Carole Jackson
Bottom Line’s Daily Health News


*This article appeared in its entirety in the Bottom Line’s Daily Health News newsletter

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