Commercial Drivers License in California

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  • Commercial driver's license

    Image:American truck.JPG

    A Commercial Driver's License is required to operate a tractor-trailer for commercial use. A Commercial Driver's License (CDL) is a driver's license required in the United States to operate any type of vehicle which has a gross vehicle weight rating (GVWR) of 26,001 lb (11,793 kg) or more for commercial use, or transports quantities of hazardous materials that require warning placards under Department of Transportation regulations, or that is designed to transport 16 or more passengers, including the driver. This includes (but is not limited to) tow trucks, tractor trailers, and buses.[1] The Commercial Motor Vehicle Safety Act of 1986 was signed into law on October 27, 1986. The primary intent of the Act was to improve highway safety by ensuring that truck drivers and drivers of tractor trailers and buses are qualified to drive Commercial Motor Vehicles (CMVs), and to remove drivers that are unsafe and unqualified from the highways. The Act continued to give states ... (see more)

  • Wig wag (truck braking systems)

    Image:wigwag.jpg

    This article is an orphan, as few or no other articles link to it. Please introduce links to this page from related articles; suggestions may be available. (February 2009) This article is about the truck brake system warning signal. For other uses, see Wigwag (disambiguation). Manual Wig Wag in warning position In truck braking systems, one type of warning for low air pressure in an air brake system of commercial trucks is called the wig wag. This device drops a mechanical arm into view when the pressure in the system drops below 60 p.s.i. An automatic wig wag will rise out of view when the pressure in the system goes above 60 p.s.i. The manual reset type must be placed in the "out of view" position manually. It will not stay in place until the pressure in the system is above 60 p.s.i. The photo to the right shows a manual wig wag which the operator swings to the right out of view when the air pressure is above 60 p.s.i. where it will remain as long as the pressure is ... (see more)

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