The directory identifies more than grants awarded to social work researchers from at least 47 different social work education programs and 15 different NIH and HHS institutes and centers.
Are multiple-trailer trucks more likely to crash than single-trailer trucks? Multiple-trailer trucks have more handling problems than single-trailer trucks.
In general, the additional connection points contribute to greater instability, which can lead to jackknifing, overturning, and lane encroachments.
But the relationship between multiple-trailer trucks and crash risk is not firmly established. A study in Washington state found that doubles tractors pulling two trailers were 2 to 3 times as likely as other rigs to be in crashes, Stein, H.
Crash involvement of large trucks by configuration: Tractor-trailer crashes in Indiana: Is defective equipment a factor in truck crashes? In the late s, Institute researchers examined crashes of large trucks in the state of Washington and found that tractor-trailers with defective equipment were twice as likely to be in crashes as trucks without defects.
Defective equipment and tractor-trailer crash involvement. Brake defects were most common; they were found in 56 percent of the tractor-trailers involved in crashes. Steering equipment defects were found in 21 percent of crash-involved trucks. Institute researchers conducted a similar study of interstate large trucks in North Carolina during and found that steering equipment defects no longer occurred with enough frequency to analyze.
Crash risk factors for interstate large trucks in North Carolina. Journal of Safety Research Having any vehicle defect also was associated with a percent increase in crash risk. A study examined the role of defective equipment in crashes included in the Large Truck Crash Causation Study.
Condition of trucks and truck crash involvement: The study gathered detailed information on a national sample of crashes involving an evident injury and at least one large truck. Post-crash inspections of the trucks indicated that almost 55 percent had at least one mechanical violation, and almost 30 percent had at least one condition serious enough to have taken the vehicle immediately out of service.
Of all equipment violations, violations in the brake 36 percent and lighting 19 percent systems were the most frequent.
A truck with an out-of-adjustment brake condition was 1. In rear-end and crossing-path crashes, brake violations significantly increased the likelihood that the truck was the striking vehicle. Are braking systems on large trucks as effective as passenger vehicle brakes? Compared with passenger vehicles, stopping distances for trucks are much longer.
On wet and slippery roads, there are even greater disparities between the braking capabilities of large trucks and cars. Braking disparities can be aggravated by poor maintenance of truck braking systems.
New large trucks must have automatic brake adjusters, visible brake adjustment indicators and antilock brakes.
Antilock brakes, which keep wheels from locking during hard braking, improve driver control of trucks during emergency stops and reduce the likelihood of tractor-trailer jackknifing.
Antilocks have been required on new tractors since and on new trailers, single-unit trucks and buses since Are large trucks prone to rolling over? Their high centers of gravity increase the risk of rolling over, particularly on curved roadway segments, such as ramps.
In55 percent of deaths among occupants of large trucks occurred in crashes in which their vehicles rolled over. Vehicle stability control systems may help to reduce this toll. Truck tractors and buses soon will be required to have electronic stability control ESC.
Office of the Federal Register. National Archives and Records Administration. The remaining types of truck tractors have until Parenting in America.
Outlook, worries, aspirations are strongly linked to financial situation. Contemporary debates about parenthood often focus on parenting philosophies: Are kids better off with helicopter parents or a free-range approach? Teen pregnancy and early childbearing are complex issues which have attracted a great deal of attention from service providers, educators, and policy makers in recent years.
1 Experience and research clearly indicate that adolescent pregnancy is associated with a variety of factors—it is not simply a problem of teens having unprotected sexual . National Institute on Alcohol Abuse and Alcoholism, part of the National Institutes of Health, is the primary U.S.
agency for conducting and supporting research on the causes, consequences, prevention, and treatment of alcohol abuse, alcoholism, and alcohol problems. NIAAA also disseminates research findings to general, professional, and. prevention science research generates the scientific evidence regarding the efficacy of intervention and prevention, specifically of activities that seek to influence or change the well-being of children and.
NYU Langone Health’s Department of Child and Adolescent Psychiatry was founded in to improve the treatment of child psychiatric disorders through scientific practice, research, and education, and to eliminate the stigma of being or having a child with a psychiatric disorder.
Research shows that the main reason children do not use alcohol, tobacco or drugs is because of their parents. Ways to build a positive relationship between parents and children in order talk to them about substance include.