socializing, preparing for a trip or vacation, and "pulling all nighters" are
of driving impairment associated with sleepiness are reaction time, vigilance, attention,
Assessment for acute sleepiness. Caffeine also is available
These data from Roehrs et al. because the well-established risks substantially outweigh the possible benefits. people (Horne, Reyner, 1995a; Dinges et al., 1987; Philip et al., 1997). Scale (ESS) (Johns, 1991) is an eight-item, self-report measure that quantifies
Sleep can be irresistible; recognition is emerging that
or relevant work, sleep, and other lifestyle habits. To provide evidence-based direction to this campaign, the Expert Panel on Driver
as alerting devices, but they will not protect drivers who continue to drive while drowsy. although caffeine content of coffee varies widely (Fox, 1993). to judge its application and efficacy in regard to noncommercial driving. Furthermore, a crash is likely to be an altering circumstance. According to the NHTSA, the combination of _____ and _____ reduce the risk of serious crash-related head injury by 83 . A
Fall-asleep crashes are likely to be serious. Ceutel, 1995; Gengo, Manning, 1990). related crashes include: Driving patterns, including driving between midnight and 6
These include sleep loss,
Reports
However, unlike the situation with alcohol-related crashes, no blood, breath, or other measurable test is currently available to quantify levels of sleepiness at the crash site. respectively (Pack et al., 1995). fragmentation cause inadequate sleep and can negatively affect functioning (Dinges, 1995). differences in individual tolerance to shift work (Harma, 1993); knowing more about the
highway safety research, the report also presents the panel's recommendations for the
timing of sleepiness and wakefulness. crash risk. Other causes are eliminated e.g. commercial and noncommercial driving. important contribution by disseminating messages to high-risk audiences, intermediaries,
and point out the risks and possible consequences of drowsy driving. of night nurses working 12-hour shifts reported having had an automobile accident or
The Expert Panel on Driver Fatigue and Sleepiness especially acknowledges
approaches that are effective for reaching high-risk audiences will need to be developed
The driver does not attempt to avoid a crash. panel requested or was forwarded formal and informal reviews and monographs by Federal,
increased when different types of studies reach similar conclusions. Young people (ages 16 to 29), especially males. The messages might be the following: sleepiness is not inevitable for teens, and it
was reported by police to have fallen asleep and the characteristics of the sleepy driver. Acute sleepiness is defined
Most adults need at least 7 hours of sleep a day, and teens need at least 8 hours. Examples include brain wave monitors, eye-closure
effects. may rely on surrogate mea- sures of sleepiness, such as duration of sleep in a recent
the true prevalence of drowsy-driving crashes, it will be important to develop a standard
Acute sleep loss, even the loss of one
self-reports of the quality of sleep. (e.g., a more alert driver can take over); consuming the caffeine equivalent of two cups
controlled-access, rural roads reduce drive-off-the-road crashes by 30 to 50 percent. Two other proven interventions avoid known problem
in other forms such as caffeine-fortified soft drinks and tablets. The VAS
a fairly clear picture emerges from studies conducted to date of the typical crash related
Promote shoulder rumble strips as an effective countermeasure for drowsy driving; in
Score 1 User: There were more than__________ people injured in alcohol-related crashes in Florida. wakefulness, the more pressure builds for sleep and the more difficult it is to resist
markets, and continuous-operation factories prosper and expand. Studies were performed in the morning
passenger drive or stopping to sleep before continuing a trip. A single vehicle leaves the roadway. disorder (American Thoracic Society, 1994). The ESS has been used in research on driver sleepiness and in correlations of
Untreated sleep apnea syndrome and narcolepsy increase the risk of automobile crashes
It is important to learn more about
road could be an attention-getting way to highlight the prevalence of chronic sleepiness
The Sleep-Wake Cycle ; Sleepiness Impairs Performance ; The Causes of Sleepiness/Drowsy Driving ; Evaluating Sleepiness ; III. A single vehicle leaves the roadway. crashes each year. pastimes often leave little time left over for sleeping. Often, however, reasons for sleep restriction represent a lifestyle choice-sleeping less
crashes; their value with other types of sleepiness or inattention crashes or other types
or sleepiness, the patterns became more pronounced. acute risk factors and frequently being on the roads during nighttime hours (greater
The ESS is not designed to
Fatigue and Sleepiness reviewed the research conducted to date on drowsy-driving crashes. facilitate napping for night shift workers (Dinges, 1992; Naitoh, 1992). evidence of a corrective maneuver, such as skid marks or brake lights, is usually absent
If drivers
performance measures, is sensitive to sleep loss, and can be administered repeatedly
colleagues (1989) found that patients with severe untreated sleep apnea had more frequent
Eliminating stress from your life is possible.Your Answer: ACorrect Answer: B. FALSEIncorrect!Explanation: Item found in Section 7.1 3. Two remedial actions can
caffeine equivalent to two cups of coffee may help improve alertness for a short period. each day; driving in the midafternoon hours (especially for older persons); and driving
A few
A measuring system would be
In lieu of an objective measure subject to parental authority. It is widely recognized that these statistics underreport the extent
educational opportunities to convey key drowsy-driving messages. substitute for good sleep habits and should not be viewed as a "driving
passenger, talking on a cellular phone or CB radio, chewing gum or ice, or snacking. Focus group research is needed to develop
dose of ethanol or placebo. Although the need for sleep varies among individuals, sleeping 8 hours per 24-hour period
messages could be lost or ignored if paired with "don't drink and drive"
or more sleepless nights (e.g., do not drive home from college the day your exams are
drowsy driving. younger drivers (25 years of age and younger) and drivers between the ages of 26 and 45. monitors, devices that detect steering variance, and tracking devices that detect lane
Nurses working the night shift reported using white noise, telephone answering
Many Americans are unaware of the
circadian rhythm changes, employers should educate employees about the problem (Harma,
CRASH CHARACTERISTICS factors in predicting crashes related to sleepiness (which this report called
evidence, such as police crash reports and driver self-reports following the event, and
In one study (Carskadon, 1990), boys with the greatest extracurricular time
It is possible that the effects of low levels of blood alcohol may have an interaction
The panel noted that the wake-up effects from remedial approaches to existing
However, younger drivers have no increased risk during the afternoon, when the predictable
or other measurable test is currently available to quantify levels of sleepiness at the
reduce lifestyle- related risks. The panel
The strength of the inferences is
sleep. NCSDR/NHTSA
Regularly losing 1 to 2 hours of sleep a
C. occurs on a high-speed road. In addition, patients with untreated
risk, research to date clearly identifies three broad population groups at high risk for
impaired to drive safely. Weegy: A typical crash related to sleepiness occurs during late night/ early morning or midafternoon and is likely to be serious. ethanol concentrations. (MSLT) (Carskadon et al., 1986; Carskadon, Dement, 1987) and the Maintenance of
The Epworth Sleepiness
crashes, with a peak at 7 a.m. to fatigue and inattention, and given the lack of objective tests or uniform reporting
2017-03-07 19:52:48. Although sleepiness and alcohol are distinct crash causes, the data also show some
Consumption of alcohol, which interacts with and adds to
effective in maintaining performance in the laboratory. strategy" that can get drowsy drivers safely to their destination. job-related duties (e.g., workers who are on call) can interrupt and reduce the quality
1994). Narcolepsy is a
these disorders and found a positive effect (Cassel et al., 1996; Haraldsson et al.,
Deputy Director
machines, and light-darkening shades to improve the quality and quantity of daytime sleep
same trend but also suggest that sleepiness may play a role in rear-end crashes and
Assessment for chronic sleepiness. slept involuntarily on the night shift. driving patterns that disregard the normal sleep-wake cycle or represent driving increased
More information is needed on chronic and acute risks
socializing. Effective countermeasures used to prevent drowsy driving and related crashes. Drinking alcohol increases sleepiness, and the combination of alcohol and
You can take effective steps if you become sleepy while driving. Others reported frequently falling asleep
attitudes, and behaviors will need to be examined. crashes occur predominantly after midnight, with a smaller secondary peak in the
It occurs during late night/ early morning or mid-afternoon. Studies of commercial vehicle drivers present similar findings. The presumption under-lying this test is that people who fall
IV. Although evidence is limited or inferential, chronic predisposing factors
Inattention can result from fatigue, but the crash literature
The three groups
Performance Slows With Sleep
The driver does not attempt to avoid the crash. characteristics similar to those cited above regarding driver age, time of day, crash
and crashes, the panel believes that shift workers' increased risks for sleepiness are
driver becomes sleepy, the key behavioral step is to stop driving-for example, letting a
Panel on Driver Fatigue and Sleepiness regarding key issues involved in the problem. of the population with symptomatic sleep apnea (Strohl, Redline, 1996). Findley and
driving home from work after an on-call night. 1996). External factors, some beyond the individual's control, include work hours, job and
usually get enough sleep. sleepy friends of teens to sleep over rather than drive home. A
Methods and Knowledge Base of This Report, Untreated Sleep Disorders: Sleep Apnea Syndrome and Narcolepsy, Consumption of Alcohol Interacts With Sleepiness To Increase Drowsiness and Impairment, Interactions Among Factors Increase Overall Risk, People With Untreated Sleep Apnea Syndrome and Narcolepsy, Medical Interventions To Treat Narcolepsy and Sleep Apnea Syndrome, Educate Young Males About Drowsy Driving and How To Reduce Lifestyle-Related Risks, Promote Shoulder Rumble Strips as an Effective Countermeasure for Drowsy Driving; in
followup survey, three of four Americans who reported getting as much or more sleep than
a car that is stopped for traffic. Wiki User. experimenting and taking risks, and testing limits. after either 8 hours or 4 hours of time in bed the previous night and with either a low
over; get a good night's sleep first). and more of the chronic or acute factors that underlie risk for everyone. The New York State survey found that about
The driver is alone in . The crash occurs on a high-speed road. performance (Dinges et al., 1987; Hamilton et al., 1972; Williams et al., 1959). et al., 1981; Broughton et al., 1984). true restriction and sleepiness may also combine this lifestyle pattern with situational acute
people who are not sleep deprived (Dinges, 1995). No definitive criteria are available for establishing how
Night shift workers typically get 1.5 fewer
Although this evidence does not demonstrate a conclusive association between shift work
Director
circadian effects. Get enough sleep! Nurses on rotating schedules reported more "accidents" (including auto
Economic pressures and the global economy place increased demands on many people to work
C. occurs on a high-speed road. Employers, unions, and shift workers are potential target audiences for education on
defining risk factors and high-risk groups than the data on sleepiness or drowsiness. The panel also identified complementary messages for the campaigns and
in developing successful educational approaches. SAS or narcolepsy perform less well on driving simulation and vigilance or attention tests
and affect other performance variables), mechanical problems, or other factors and by
sleepiness and alcohol interact, with sleep restriction exacerbating the sedating effects
Young people. loss of one night's sleep can lead to extreme short-term sleepiness, while habitually
hygiene) (Minors, Waterhouse, 1981; Rosa, 1990). Shift workers who completed a 4-month
Appropriations Committee report noted that "NHTSA data indicate that in recent years
uninterrupted sleep, which may help reduce sleepiness on the job and behind the wheel. (Kozena et al., 1995; Van Laar et al., 1995; Ray et al., 1992; Leveille et al., 1994;
Personal Demands and Lifestyle Choices. Falling asleep
Some of these devices contain alarms or other alerting devices
steps include planning sleep and naps before long trips, scheduling trips to avoid
show that sleepy drivers are less likely than alert drivers to take corrective action
in people with cognitive or attention performance impairments such as those from
it occurs. CRASH CHARACTERISTICS First, it
health as well as drowsy-driving prevention. For example, an educational campaign
Testing during the daytime followed
Latency
The panel identified three major categories in which more evidence is needed: Quantification of the problem. to reduce the likelihood of excessive sleepiness and drowsy driving. typical crash related to sleepiness has the follow-ing characteristics: The problem occurs during late night/ early morning or midafternoon. scientific rigor of all this material, original papers, reviews, monographs, and reports
Cleveland Veterans Administration Hospital, Sharon L.
Laboratory tools for measuring sleepiness include the Multiple Sleep Latency Test
drift (Dinges, 1995). overtime, or rotating shifts is a risk for drowsy driving that may be both chronic and
circadian sleepiness peak is expected. Critical aspects of driving impairment associated with sleepiness are reaction time, vigilance, attention, and information processing. group is high school age and more likely to live at home with parents; members of the
sleep can reduce sleep debt. Contemporary society functions 24 hours a day. The MSLT and MWT were developed for neuro- physiologic assessment and are sensitive to
see sleep as a luxury. It also will be important for
Consuming caffeine. The driver does not attempt to avoid a crash. timeframe or sleep/work patterns. Those who suffer chronic sleep
of roads has not been studied. working extended shifts (day plus evening plus night), and working many hours a week
However, this is not just a reporting problem;
the keywords listed above and following suggestions for linkage to related topics (e.g.,
also works part-time, participates in extracurricular activities, and has an active social
1 answer. impairment that result from consuming alcohol when drowsy. Vehicle-based tools. Drivers ages 45 through 65 have fewer nighttime
five men (20.2 percent) and almost one in six women (15 percent) work other than a daytime
Promote shoulder rumble strips as an effective countermeasure for drowsy
throughout the day. The panel also designated shift workers as a high-risk group because the number of
(National Sleep Foundation Survey, 1997; American Thoracic Society, 1994). of driving while drowsy, or unaware of the seriousness of the difficulty they may
categorically too sleepy to drive a motor vehicle (Mitler, Miller, 1996). disruption (Czeisler et al., 1990; Stampi, 1994). The primary internal cause is illness, including untreated sleep disorders. association of these topics with driving risk and crash prevention. only those crashes known not to be caused by alcohol (because alcohol can cause sleepiness
head-on crashes (Knipling, Wang, 1994). impairment are neurobiological responses of the human brain to sleep deprivation. Panel Chairman Director, Center for Sleep Disorders Research
Sleep-Wake Activity Inventory (Rosenthal et al., 1993b). were more likely to report having sometimes or very often driven drowsy (McCartt et al.,
The terms "fatigue" and "inattention" are sometimes used
In addition, periods of work longer than 8 hours have been shown to impair task
noncommercial crashes, investigators have begun to collect and analyze data for instances
typical crash related to sleepiness has the follow-ing characteristics: The problem occurs during late night/ early morning or midafternoon. night. Interaction Between Alcohol and
practical for crash assessment; however, the use of a modified "nap test" has
Knipling and Wang (1995) found that drivers
During the night, from 2330 to 0800 hours
reduce them. Laboratory studies explain and predict these patterns. In the longer term, planning ahead can help people avoid driving while drowsy. family, second jobs, and recreation often further restrict the hours available for sleep
before a crash (Wang, Knipling, Goodman, 1996). make a short-term difference in driving alertness: taking a short nap (about 15 to 20
fragmented by frequent interruptions (Marcus, Loughlin, 1996). NHTSA data show that males
sleepiness and alcohol and may not recognize related impairments they experience. In a survey of hospital nurses, night nurses and rotators were more likely than nurses on
near-miss accident while driving home from night work (Novak, Auvil-Novak, 1996). Driving simulation tests specifically show
dependent on both the presentation of the instructions and the subject's interpretation of
assessments of noncommercial crashes. crash. encourage them to drive long after impairment, and inhibit their taking effective
Potential sponsors may
commitments were most likely to report falling asleep at the wheel. Driving between midnight and 6 a.m. is a high-risk situation. The panel reviewed the knowledge base in four categories of countermeasures:
shift work and drowsy driving issues. public. Studies based on driver self-reports: Maycock, 1996; McCartt et al., 1996). at-risk drivers who do not crash and about the impact of drowsiness on driving at all
In driving simulators,
(See section V
family responsibilities, combining work and education, and making time for enjoyable
Scale (SSS) (Hoddes et al., 1973) is an instrument that contains seven statements through
The report presents the results of a literature review and opinions of the Expert
risks and how to reduce them. Nelson, Nancy Isaac, Kathy Rechen, and, at Prospect Associates, Donald Cunningham and
night of sleep, results in extreme sleepiness (Carskadon, 1993b). Although treatment can improve
most effective way to reduce sleepiness. Laboratory and some field studies suggest that most
It appears
The crash is likely to be serious. (1994) were
The panel would like to thank the following people for their assistance in reviewing and
younger than 30 accounted for almost two-thirds of drowsy-driving crashes, despite
In another alcohol strategy variation, parents might allow
Figure 1. Training, occupation, education, motivation, skill level, and intelligence exert no
during late night/early morning hours increases risk for all drivers because those hours
strips in perspective. effectiveness of rumble strips has been demonstrated only in drive-off-the-highway
Circadian factors. Young males, ages 16 to 24, received highest priority because of their clear
Survey, 1997). than do people without these disorders (Findley, 1995; American Thoracic Society, 1994;
before bedtime) (Richardson et al., 1982; see figure 1). They are not a
Despite these caveats,
fatigue-related accidents was one of its most wanted transportation safety improvements for 2016. of day was the most consistent factor influencing driver fatigue and alertness. 1988), listening to the car radio, or opening the car windows (Horne, Reyner, 1995a). commenting on the report: Mary Carskadon, David Dinges, Lynn Butler, Nick Teare, Toben
alert as an indication of impairment-a signal to stop driving and get adequate sleep
studies to date have evaluated crash experiences of patients successfully treated for
be used to assess situational sleepiness or to measure sleepiness in response to an acute
Yes it is a depressant, it will cause sleepiness. that risk is highest soon after the drug regimen is initiated and falls to near normal
fall asleep, a process that is the result of both the circadian rhythm and the need to
However, rumble strips are not a solution for sleepy drivers, who must view any wake-up
The panel believes that focusing a campaign on shoulder rumble strips offers multiple
The "all nighter" represents an acute risk because extreme tiredness
When a driver becomes drowsy, the most obvious behavioral step for avoiding a crash is
Ph.D.
studies and between groups of different ages or cultures. driving. Studies of
rural roads. influenced by the light/dark cycle, which in humans most often means wakefulness during
can be" (right end). drowsy-driving crashes. As detailed in section III, the greatest proportion of drowsy-driving crashes
The behavioral steps discussed earlier for younger males also seem reasonable for
In the New York State survey, the reported frequency of drowsy driving in the past year
electrophysiological measures of sleep, and there is interest in vehicle-based monitors. Critical aspects
identified a number of chronic predisposing factors and acute situational factors that
shifts or more within a month) caused the most severe sleep disruptions of any work
State of New York, David Willis
The MSLT mea- sures the tendency to fall
midnight and 6 a.m. (Mitler et al., 1988; kerstedt, 1995c), especially well into the
The panel concluded that the data on fatigue and inattention provide less support for
disallow late-night driving among younger drivers can mandate this risk-avoiding behavior
Many researchers have shown that
Many Americans do not get the sleep
shift work are associated with lapses of attention, increased reaction time, and decreased
The crash is likely to be serious. As a result, our understanding of drowsy-driving crashes is based on subjective
(based on a 24-hour clock), subjects were awakened every 2 hours for 15 minutes, and
whereas a rating of 15 or greater indicates severe sleepiness. occur about 12 hours after the midsleep period (during the afternoon for most people who
family responsibilities, and school bus or school opening times. (acute) sleepiness and the vehicle-based technology to sense sleepiness. (For more on this topic, see section
People with narcolepsy are as likely to be
need information on the risks of drowsy driving and crashes to put the need for rumble
In a recent study, people whose sleep was restricted to 4 to
alcohol" crashes involved a higher percentage of young males than did crashes in
shift]) could enhance understanding of the problems. disorders report no auto crashes (Findley et al., 1988; Aldrich, 1989). Educate shift workers about the risks of drowsy-driving and how to reduce them. In addition, the
The effects of sleep
D. all of the above Weegy: A typical crash related to sleepiness involves multiple vehicles on the roadway. drive even when they know they are drowsy and fighting to stay awake. 4-day week schedule than with an 8-hour, 6-day week (Brown, 1994). In addition, Maycock (1996) found that higher scores on the ESS were positively
evaluations of potential countermeasures, most of which were laboratory studies. that they had been involved in a motor vehicle crash, 40 percent of which occurred while
B. involves multiple vehicles on the roadway. This technology is cur- rently being examined in physiologic,
State, and nongovernmental agencies. Taking a break for a short nap (about 15 to 20
B. involves multiple vehicles on the roadway. specially trained personnel and are not valid if the individual being tested is ill or in
apnea, relief of sleepiness and related symptoms is not always easily achievable for all
quantification. Sleepiness causes auto crashes because it impairs performance and can ultimately lead to the inability to resist falling asleep at the wheel. These rumble strips placed on high-speed,
The problem occurs during late-night hours. respondents averaged 3 hours of sleep during 33-hour on-call shifts, much of which was
collected in a laboratory using a driving simulator. There are some in-vehicle systems that
alertness, rather than demonstrate an intervention that reduces drowsy-driving crashes. management approaches is likely to be most effective. Expert answered| Mr.BreadMan |Points 167| Log in for more information. Sleepiness, Kingman P.
People who have
Carskadon (1990) offers a variety of age-specific reasons for the involvement of younger
National Heart, Lung, and Blood Institute
also identifies preoccupation, distractions inside the vehicle, and other behaviors as
Sleep apnea syndrome is somewhat more common among males than among females, and
many of which are appropriate for all public audiences: Sleepiness is a serious risk for young male drivers. Driving while sleepy
to have more time to work, study, socialize, or engage in other activities. carries the greatest risk of sleep disruption because it requires workers to contradict
behaviors (e.g., duration of prior wakefulness, recent sleep-wake patterns, the quality
wakefulness. This similarity suggests the possibility that the researchers' initial
message that rumble strips are designed to arouse sleepy drivers before they drive off the
complements Federal Highway Administration efforts to address the problem among commercial
exercise (e.g., getting out of the car and walking around for a few minutes) (Horne,
The proportion of crashes is
required for safe driving. crash reports in North Carolina showed the majority of the nonalcohol, drowsy-driving
However, Maycock (1996) found that a greater absolute number
Homeostasis relates to the neurobiological need to sleep; the longer the period of
People scoring 10 to 14 are rated as moderately sleepy,
at the wheel without crashing, for example, while stopped at a traffic light. is important to give regular priority to getting good sleep by creating a quiet, cool,
driving simulator performance (Findley et al., 1989), individual performance varies. 1996). This
disturbances such as noise, children, activity and lights, a restless spouse, or
interchangeably with sleepiness; however, these terms have individual meanings (Brown,
other steps to improve alertness when sleepy, such as opening a window or listening to the
have higher risks than do females or other age groups across all drug classes. higher for people with untreated narcolepsy than it is for people with untreated SAS. standard Multiple Sleep Latency Test procedures. people who perform shift work-and are thus exposed to crash risk-is increasing. to fall asleep again unless he or she stops driving. over-representation in crash statistics and because many of their lifestyle risks are
is instructed to try to fall asleep. Their higher risk is based on (1) evidence from crash data of a
obtain sufficient restorative sleep. In a recent Gallup survey, approximately
and quantity of sleep. Score 1 "sleepiness" in a continuum along a 100-mm line (Wewers, Low, 1990). Common characteristics of crashes related to drowsy driving and sleepiness. Institute for Traffic Safety Management and Research
for longer times without taking a break. instead of sleep, and work hours and demands are a major cause of sleep loss. According to a 1996 report, time
Many drowsy-driving crashes occur at this time. Horne and Reyner (1995a) suggest that a combination of having more of the chronic and
age groups were overrepresented in fall-asleep crashes (New York State Task Force, 1996). The panel also believes it may be worthwhile to educate
The strips are not a technological quick fix for sleepy drivers. drowsiness peaking from late evening until dawn (Wylie et al., 1996). longer (Maycock, 1996). found no evidence of effectiveness for commonly accepted remedial approaches such as brief
al., 1997). The minimum dose needed can be obtained in about two cups of percolated coffee,
V on shift workers.). government agencies. An ideal measure of sleepiness would be a physiologically based screening tool that is
of darkness. Critical aspects of driving impairment associated with sleepiness are reaction time, vigilance, attention, and information processing. driving drowsy was associated with working a rotating shift, working a greater number of
routinely get less sleep and lower quality sleep than do day workers. before driving is both easier and much more successful than any remedial measure reviewed. Office of Research and Traffic Records
care professionals may not recognize a history of sleepiness as a risk factor for
Anchors for
Laboratory and epidemiological studies of drowsy-driving countermeasures. British study (Maycock, 1996), respondents said that working the night shift led to
to stop driving and sleep for an extended period. the need to drive. For example, many people with these