FMCSA Releases Research on Benefits of Speed Limiters in Large Trucks

Benjamin Smith
Principal Technical Analyst
MSC MS

The Federal Motor Carrier Safety Administration (FMCSA) released research this week on the benefits of using speed limiters (SLs), also known as speed governors, in large trucks. For more information, view the FMCSA's document, titled "Speed-Limiters."  
SLs are a technology that allows trucking fleets or truck owners to program a preset maximum speed of travel. Many trucking fleets use SLs not only to increase safety by reducing their trucks’ top speed, but also to reduce tire wear, extend the life of the brakes and engine, improve fuel economy, and so on.  

In January 2011, the National Highway Traffic Safety Administration (NHTSA) proposed limiting the speed of all heavy trucks to 68mph. NHTSA stated its intent to initiate the rulemaking process on this issue in 2012. Read NHTSA's notice in the Jan. 3, 2011 Federal Register.   

Viewpoints differ on the issue of mandating the use of SLs in heavy trucks. Agencies and groups such as the American Trucking Associations (ATA), Road Safe America, and the Truckload Carriers Association, have stated their support for SLs in large trucks for reasons including reduced severity of crashes and various economic benefits. However, critics of government-mandated SLs, such as the Owner-Operator Independent Drivers Association (OOIDA), have stated their opposition for reasons such as the potential for speed-governed trucks to become “rolling roadblocks” when operating in faster flows of traffic.  

Research published in the American Journal of Public Health in March 2009, titled “The Effect of State Regulations on Truck-Crash Fatalities,” examines the effects of certain traffic safety policies and restrictions on fatality rates in truck-involved crashes.

National Sleep Foundation 2012 Poll: Transportation Professionals' Sleep Habits, Work Performance

Kelly Messerschmidt
Technical Communications Manager

National Sleep Awareness Week is currently being observed in the US (March 5-11, 2012). According to the National Sleep Foundation 2012 poll--the first to ask transportation professionals about their sleep habits and work performance--11% of pilots, train operators, and bus/taxi/limo drivers, and 8% of truck drivers are "sleepy." Read the press release.

The poll also found that 14% of truck drivers, and 12% of bus/taxi/limo drivers polled reported having had a "near miss" due to sleepiness. Although individuals' sleep needs vary, most research assumes that normal adults sleep for 7-8 hours per night.

In NHTSA's "Drowsy Driving and Automobile Crashes" report, shift-workers whose sleep is disrupted by working at night, or working long or irregular hours, are categorized as being one of the three population groups at highest risk for "drowsy-driving" crashes. According to the National Sleep Foundation 2012 poll, a significant number of the transportation workers said their schedules do not allow enough time for sleep.

NHTSA Proposes Guidelines Against "Excessively Distracting Devices"

William Messerschmidt
Principal Technical Analyst

On 02/24/12, the US National Highway Traffic Safety Administration (NHTSA) proposed new guidelines for auto manufacturers that cover original-equipment, in-vehicle devices that augment or facilitate “secondary tasks” in which visual information is received and a physical action is performed in response to that information.

By “secondary tasks,” NHTSA means actions that we perform while we operate or control the vehicle, which are not part of the primary task (driving), such as entertainment and communication. For example, the timely prompt from your GPS device to “in a half mile, make a right turn,” is considered part of the primary task (driving), but texting a friend your arrival time is a secondary task.

Almost all drivers engage in secondary tasks while driving (such as adjusting climate control, changing radio stations), and often there is very little decrease in their safety. However, as technological advances make more and more options accessible to the driver, the potential exists to build in dangerous devices. For example: your in-dash GPS display isn’t a distraction under most circumstances, but imagine if that same display showed your Facebook News Feed! [Please note that absolutely no manufacturer has ever proposed this extreme example.]

In order to differentiate between the less extreme (and more realistic) examples of safe versus unsafe technology, researchers considered variables such as the type of information displayed, the manner in which it is displayed, and the type of manual response elicited by the information.

The NHTSA guideline describes five types of displays or devices that are always unsafe. They are:

• Photographic or video images not immediately related to driving (images such as blindspot cameras, GPS navigation, and weather information are considered directly related to the driving task);
• Photographic or graphical static visual images that are unrelated to driving (such as album art and personal photos);
• Automatically scrolling text;
• Manual text entry of more than six key presses;
• Reading more than 30 characters (not including spaces and punctuation).

You can read a short summary of the new NHTSA Guidelines at Occupational Safety Online, or view the document in its entirety in the Federal Register, Vol. 77, Issue 37.

NHTSA to Use New "10 Year Old Child" Crash Test Dummy

An adult crash test dummy (photo by Ben Smith)Benjamin Smith
Principal Technical Analyst

The National Highway Traffic Safety Administration (NHTSA) announced last week that they will be using a newly developed "10 year old child" crash test dummy. According to NHTSA, this new crash test dummy was created  so that boosters and child safety seats designed for children over 65 pounds could be tested in the most effective manner possible. Read the full press release dated 02/21/12.

The new dummy will allow NHTSA to assess the risk of injuries using head and knee excursions and chest acceleration. The expanded testing capabilities will also allow for the evaluation and certification of higher weight booster seats (designed for children weighing 65-80 pounds), in compliance with recent rule changes issued by NHTSA.

Currently NHTSA recommends that children be seated in a car seat with a harness (up to the specifications of the seat) until they are large enough to fit properly in a seat belt, which they say is generally when the child is between 8-12 years and about 4'9" tall. Read more about properly fitting seat belts for children ages 8-12 years.

Bendix Identifies Possible Defect in Certain Bendix ATR-6 Valves

Kelly Messerschmidt
Technical Communications Manager

According to a statement released by Bendix Commercial Vehicle Systems on February 02, 2012, Bendix notified NHTSA of a potential defect in the Bendix ATR-6 valves that were manufactured between December 02, 2010 and January 18, 2012. Bendix states that the potential defect could occur when vehicles are being operated in extremely cold conditions (at or below 0 degrees Fahrenheit). According to Bendix, approximately 50,000 to 60,000 vehicles are affected.

Bendix is offering a temporary remedy kit free of charge, which is for use until they make the permanent remedy kit available. Visit the “Product Action Center” page on the Bendix website for information and updates about this issue. Questions or comments about this matter can be directed to Bendix representatives at the Bendix ATR-6 Action Line, at 1.800.478.1793, seven days a week, between the hours of 7am-8pm Eastern Time.

Due to the potentially defective valve, Paccar Inc. has recalled those Kenworth and Peterbilt trucks built between January 2011 and January 18, 2012. To learn more about the Paccar recall, read this news article at Truckinginfo.