Truck Inventory and Use Survey (TIUS) 1977 [supporting datasets]
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Truck Inventory and Use Survey (TIUS) 1977 [supporting datasets]

Filetype[PDF-117.47 KB]

  • English

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    • Abstract:
      The Truck Inventory and Use Survey (TIUS) is one of the surveys included in the Census of Transportation. Its primary purpose is to collect and publish data on the physical and operational characteristics of the Nation's truck resources. The 1977 TIUS Survey is based on a stratified probability sample of about 117,000 trucks, drawn from an estimated 28 million registrations on file with motor vehicle departments in the 50 States and the District of Columbia during 1977. For sampling purposes, the States are divided into three groups based on the total number of trucks registered annually, and two vehicle size strata are formed based on body type (small= pickups, panels, vans: large= all others) as shown by the motor vehicle registration record. Individual trucks are sampled and expanded back to the State level. Vehicles owned by Federal, State, and local governments, as well as ambulances, buses, and motor homes, are eliminated from the sample before questionnaires are mailed. Various other vehicles which are actually surveyed are subsequently classified as "out-of-scope": trucks sold prior to 1977, farm tractors, open jeep models, unpowered trailer units, trucks reported to have been junked or wrecked prior to the registration year, etc. For the first time, however, certain small utility-type vehicles built on pickup and van chassis are included in the sample. Many States allow pickups and small vans to be registered as cars or trucks: therefore, the passenger car files are searched, and any such trucks are included in the sample universe. Some privately or commercially owned vehicles do not have to be licensed, such as "off-highway" trucks used exclusively on private property, and since they had no chance of being drawn in the sample, they are not covered in the survey. The survey was first conducted in 1963. It has since been conducted every 5 years as part of the economic census. Title 13 of the United States Code (Sections 131, 191, and 224) directs the U.S. Census Bureau to take the economic census every 5 years, covering years ending in 2 and 7.
    • Content Notes:
      In 1997 the Truck Inventory and Use Survey (TIUS) was renamed the Vehicle Inventory and Use Survey (VIUS).
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