(HealthDay News) — One in 25 U.S. drivers reports having fallen asleep while driving during the past month, the U.S. Centers for Disease Control and Prevention says. The first step to prevention is recognizing the symptoms of driving drowsy, the agency says, offering this list of warning signs: Yawning or blinking a lot. Having difficulty remembering the past few miles driven. Missing your exit. Drifting from your lane. Hitting a rumble strip on the side of the road.

Motorcycle crashes are far costlier than car accidents, both in lives lost and in medical expenses, a new study shows. Canadian researchers found that the death rate from motorcycle crashes was five times greater than from car crashes, and the rate of severe injury was 10 times greater. That came with a six times greater cost to the health care system. Though the findings stem from an analysis of traffic accidents in the Canadian province of Ontario, the researchers said that similar patterns would likely be seen elsewhere. One reason: Motorcycles are inherently more risky because motorcycles lack the protections that cars provide. “It’s clear that it’s much more dangerous to ride a motorcycle than to ride in a car,” said lead researcher Dr. Daniel Pincus. But the study isn’t saying that motorcycles should be taken off the road. “A lot of people enjoy riding motorcycles, so we’re not saying the answer is to ban them from doing it,” said Pincus, who’s with the Institute for Clinical Evaluative Sciences, in Toronto. Riding simply should be made safer, he said. Kara Macek, a spokesperson for the Governors Highway Safety Association (GHSA), agreed. Universal helmet laws are one way, she said. In the United States, only about half of states require helmets for all motorcyclists, according to the GHSA. “Just telling people to wear helmets is not…  read on >