Includes all Tractor Trailer Trucks and Commercial Vehicles. [fimg=right]http://www.cleanmpg.com/photos/data/501/Phoenix_Area_Motorcycles_wrecked.jpg[/fimg]Wayne Gerdes - CleanMPG - Feb. 23, 2011 Three people are dead and six others were in critical condition following this motorcycle group wreck in Phoenix when an empty dump truck ran over the bikers stopped at a red light in March of last year. Based on their numbers on the road and on the amount they travel, large trucks (tractor-trailers, single-unit trucks, and some cargo vans weighing more than 10,000 pounds) account for a higher fatal crash rate per mile traveled than passenger vehicles, although a higher percentage of large truck travel occurs on interstates, the safest roads. Most deaths in large truck crashes are passenger vehicle occupants rather than occupants of large trucks. The main problem is the vulnerability of people traveling in smaller vehicles. Trucks often weigh 20-30 times as much as passenger cars, and are taller with far greater ground clearance. Truck braking capability can be a factor in truck crashes. Loaded tractor-trailers take 20-40 percent farther than cars to stop, and the discrepancy is greater when trailers are empty, on wet and slippery roads, or with poorly maintained brakes. Truck driver fatigue also is a known crash risk. Drivers of large trucks are allowed by federal hours-of-service regulations to drive up to 11 hours at a stretch and up to 77 hours over a 7-day period. Surveys indicate that many drivers violate the regulations and work far longer than permitted. Sobering DOT statistics for 2010 US accidents involving Semi Truck, Tractor Trailer, and Commercial Vehicles reveal fatalities are rising even though non-truck related car fatalities have fallen drastically over the past couple of years. In 2010 over 500,000 Large Truck and Commercial Vehicles were involved in accidents; with over 100,000 people sustaining serious injuries, and over 5000 people dying in these crashes. This was compared to just 3200 deaths involving large trucks in 2009. As the economy picks up steam, predictions include an over 20% increase in truck traffic by 2012. Many safety groups have called for the U.S. DOT to increase safety regulations to stem the death toll due to the increasing number of Semi Truck, Tractor Trailer, and Commercial Vehicle Accidents that continue to rise year over year. This is especially true in large states with large commercial truck traffic such as: California, Texas, New York, Florida, Ohio, Pennsylvania, and Arizona. And while the voices are being heard, it is those that have fallen silent that have sadly paid the ultimate price… Any given day on today's highways and byways 3 + seconds back up front. Spin the camera around and look what is trying to climb into my trunk And we see this same kind of thing day after day after day… Here are 6-trucks traveling WB on I-90 just before I-84 at approximately 70 mph (5 mph over the PSL) within ¼ of a second of one another. A sedan is in front of the pack at 70 mph in the far right hand lane… When is enough, enough? Source.