1992 CENSUS OF TRANSPORTATION 1992 TRUCK INVENTORY AND USE SURVEY EXPLANATION OF TERMS =>OPERATIONAL TERMS => NEW ITEMS INTRODUCED IN 1992: ->NUMBER OF WEEKS OPERATED Respondents were asked to report the number of weeks during 1992 the vehicle was operated. ->NO HOME BASE Respondents were asked to report if the vehicle or vehicle/trailer(s) combination was used for consumer one-way truck rental or as an over-the-road truck tractor and did not operate from a home base location. Data for these vehicles are tabulated under percentage of miles traveled outside base of operation State. ->TYPE OF HOME BASE Respondents were asked to report the type of location where the vehicle was usually parked when it was not on the road. This information is available on the public-use microdata product only. ->TYPE OF REFUELING LOCATION Owners of large trucks were asked the type of location where the vehicle was primarily refueled during 1992. ->KIND OF SERVICE Owners of large trucks who reported the vehicle was operated with for-hire authorization were asked to report the approximate percentage of 1992 mileage by truckload and less-than-truckload service. => 1992 CHANGES AFFECTING SPECIFIC ITEMS ->HOW DISPOSED An "other" category was added as a separate response to determine other types of vehicle disposal. This information is available on the public-use microdata product only. ->WHEN DISPOSED If a vehicle was disposed of on or after July 1, 1991, but prior to January 1, 1992, respondents were asked to report vehicle's use during calendar year 1991. This methodology replaces respondents reporting "last 12 months use" of those vehicles which were owned (or leased) and disposed of prior to the survey year. ->HOW OBTAINED An "other" category was added as a separate response to determine other ways of vehicle acquisition. This information is available on the public-use microdata product only. ->OPERATOR CLASSIFICATION. Refers to a percent reported in any of the operator classifications. ->PRIMARY RANGE OF OPERATION Separate responses for "trips between 200 and 500 miles" and "trips beyond 500 miles" were added. The 1987 response of "trips between 50 and 200 miles" was divided into two separate responses for 1992: (1) trips between 50 and 100 miles and (2) trips between 100 and 200 miles from vehicle's homebase location. ->RANGE OF OPERATION Refers to a percent reported in any of the range of operation classifications. ->PERSONAL TRANSPORTATION "Carpool" use vehicles in a nonbusiness capacity are included in the personal transportation category. ->FOR HIRE OPERATION TYPE A "private fleet" category was added with two separate responses on the TC-9502 questionnaire requesting the percentages of 1992 mileage the vehicle operated as: (1) a private carrier and (2) a private carrier with for-hire authority (i.e., backhauls, trip leasing, etc.). This information is available on the public-use microdata product only. ->PRIMARY PRODUCTS CARRIED New categories were added to the list of products carried. They are: (1) passenger transportation (the TC-9501 questionnaire only), (2) no load (vehicle empty), (3) animal feed, and (4) recyclable products. "Hazardous waste" collected in 1987 was divided into two separate categories for 1992: (1) EPA manifest and (2) non-EPA manifest. ->PRODUCTS CARRIED Refers to a percent reported in any of the products carried classifications. ->MILES PER GALLON Check box ranges were developed on the TC-9501 questionnaire replacing the 1987 specific response for pickups, vans, utility-type vehicles, minivans, and station wagons on truck chassis. ->HAZARDOUS MATERIALS CARRIED The 1987 check box percentage ranges of placard-required hazardous materials mileage were replaced with individual mileage percentage responses of each placard-required hazardous material hauled during 1992. The published results represent the number of trucks which hauled placard-required hazardous materials during 1992 because multiple responses were possible. Data are displayed under the new and revised placard name categories. ->FLEET SIZE Check box ranges were developed for the total number of vehicles/trailers owned and/or operated by an individual or for a company replacing the 1987 data item requesting fleet composition of vehicles and equipment on an establishment basis. => TERMS ->HAZARDOUS MATERIALS. This category was designed to identify those trucks which regularly transport hazardous materials in quantities large enough to require a placard under the Code of Federal Regulations, Title 49,(CFR.177.823) Transportation. ->HOME BASE. The location where the vehicle was usually parked when it was not on the road. ->HOW DISPOSED. An "other" category was added as a separate response to determine other types of vehicle disposal. This information is available on the public-use microdata product only. ->MAJOR USE. This item is based on the business or the part of the business in which the vehicle was used. The 15 specific major use categories conform to the generally accepted meaning of the terms. Responses in the "Other" category were recoded to one of the specific categories, if possible. The category "Not in use" in table 2 includes vehicles which, though licensed, were not operated or were wrecked/inoperative for more than 6 months during 1992. ->NO HOME BASE. Vehicle (usually an over-the-road truck tractor or consumer one-way rental) which did not operate from one specific home base location. ->NUMBER OF WEEKS OPERATED. Respondents were asked to report the number of weeks during 1992 the vehicle was operated. ->PRIMARY OPERATOR CLASSIFICATION. Refers to the operation classification with the highest reported percent. This item consists of not for hire, for hire, daily rental, and mixed. NOT FOR HIRE. Includes a private owner or a company which transports its own materials or merchandise or uses the vehicle for personal transportation. "Carpool" use vehicles in a nonbusiness capacity are included in the personal transportation category. FOR HIRE. Includes the following: MOTOR CARRIER. Those vehicles operated by a company whose primary business is to provide transportation services carrying freight belonging to others. OWNER/OPERATOR. Vehicles operated by an independent trucker who drives the vehicle for himself or on lease to a company. PRIVATE FLEET. A "private fleet" category was added with two separate responses on the TC-9502 questionnaire requesting the percentages of 1992 mileage the vehicle operated as: (1) a private carrier and (2) a private carrier with for-hire authority (i.e., backhauls, trip leasing, etc.). This information is available on the public-use microdata product only. KIND OF SERVICE. Owners of large trucks who reported the vehicle was operated with for-hire authorization were asked to report the approximate percentage of 1992 mileage by truckload and less-than-truckload service. TYPE OF CARRIER. These categories are limited to for hire, interstate operators: CONTRACT. Offers transportation services to certain shippers under contracts. COMMON. Offers transportation services to the general public over regular or irregular routes. EXEMPT. Transports commodities or provides types of services that are exempt from federal regulation, could also operate within exempt commercial zones. DAILY RENTAL. Vehicles rented or leased out under daily or short-term rental or lease agreements (not motor carrier). MIXED. A mixture of the operator classifications above with equal percentages of use for at least two of the three categories. If the percentages were not equal, the answer was recoded to the operator classification with the highest percentage. ->PRIMARY PRODUCTS CARRIED. Refers to the product with the highest reported percent. This item includes broad classifications of agricultural, manufacturing, mineral products, and special categories of materials carried by trucks. Responses to the "Other" category were recoded to 1 of the 29 specific categories if possible. New categories were added to the list of products carried. They are: (1) passenger transportation (the TC-9501 questionnaire only), (2) no load (vehicle empty), (3) animal feed, and (4) recyclable products. "Hazardous waste" collected in 1987 was divided into two separate categories for 1992: (1) EPA manifest and (2) non-EPA manifest. ->PRIMARY RANGE OF OPERATION. Refers to the range of operation with the highest reported percent. Separate responses for "trips between 200 and 500 miles" and "trips beyond 500 miles" were added. The 1987 response of "trips between 50 and 200 miles" was divided into two separate responses for 1992: (1) trips between 50 and 100 miles and (2) trips between 100 and 200 miles from vehicle's homebase location. The type of trip in which the vehicle usually operates is classified as one of the following: LOCAL. Less than 50-miles from vehicle's home base (the farm, terminal, factory, mine, or other place where the vehicle is stationed). SHORT RANGE. Trips between 50 and 100 miles from vehicle's home base. SHORT RANGE-MEDIUM. Trips between 100 and 200 miles from vehicle's home base. LONG RANGE-MEDIUM. Trips between 200 and 500 miles from vehicle's home base. LONG RANGE. Trips beyond 500 miles from vehicle's home base. OFF-THE-ROAD. Minimal use of public roads (usually associated with construction and farming activities). ->TRUCK FLEET SIZE. Check box ranges were developed for the total number of vehicles/trailers owned and/or operated by an individual or for a company replacing the 1987 data item requesting fleet composition of vehicles and equipment on an establishment basis. The size of the truck fleet is based on the number of trucks operated by a truck owner for its entire operation. The data shown in the "Truck Fleet Size" section of the tables are based on the number of trucks found in fleets of specified size and not the number of fleets. (If this item on the survey form was unanswered, the vehicle was estimated in the "not reported" category.) ->TYPE OF HOME BASE. Respondents were asked to report the type of location where the vehicle was usually parked when it was not on the road. This information is available on the public-use microdata product only. ->TYPE OF REFUELING LOCATION. Owners of large trucks were asked the type of location where the vehicle was primarily refueled during 1992. ->WHEN DISPOSED. If a vehicle was disposed of on or after July 1, 1991, but prior to January 1, 1992, respondents were asked to report vehicle's use during calendar year 1991. This methodology replaces respondents reporting "last 12 months use" of those vehicles which were owned (or leased) and disposed of prior to the survey year. =>PHYSICAL TERMS => NEW ITEMS INTRODUCED IN 1992: ->EMPTY WEIGHT OF PICKUPS, VANS, MINIVANS, UTILITY-TYPE VEHICLES, AND STATION WAGONS ON TRUCK CHASSIS Respondents who received the TC-9501 questionnaire were asked to report the empty weight (vehicle weight minus cargo weight) of the vehicle as it was usually operated. ->BOBTAIL Owners of large trucks who reported the vehicle was usually operated as a straight truck or truck tractor pulling a trailer were asked to report the approximate percentage of 1992 mileage that no trailer was pulled. This information is available on the public-use microdata product only. ->TRAILER/AXLE CONFIGURATION Owners of large trucks who reported the vehicle was usually operated as a straight truck or truck tractor pulling one or more trailers were asked to report the appropriate percentage of 1992 mileage of the trailer/axle configuration most often pulled. ->EXTERIOR LENGTH OF TRAILER(S) Owners of large trucks who reported the vehicle was usually operated as a straight truck or truck tractor pulling one or more trailers were asked to report the exterior length of the individual trailer(s) most often pulled. This information is available at the U.S. level and on the public-use microdata product only. => 1992 CHANGES AFFECTING SPECIFIC ITEMS ->PIGGYBACK, CONVENTION TRAILERS OR CONTAINERS A separate category for conventional trailers was added to complete inclusion of all intermodal equipment haul types. This information is available on the public-use microdata product only. ->OVERALL LENGTH Separate check box ranges were developed for length to replace 1987 specific response. ->WIDTH OF TRAILER Separate check box ranges were developed for width to replace 1987 specific response. This information is available on the public-use microdata product only. ->BRAKES An "other" category was added as a separate response to determine other types of brakes. ->STANDARD OR OPTIONAL EQUIPMENT New categories were added to the list of equipment characteristics. They are: (1) antilock brake system and (2) on-board computer/electronic vehicle management system on both questionnaires. In addition, the TC-9501 questionnaire (small trucks) included additional new categories: (1) vehicle control aids for handicapped drivers and (2) wheelchair lifts. ->ENGINE TYPE Separate responses for leaded and unleaded gasolines were developed to determine fuel use by engine. Published results of engine type are cited for "gasoline" only. Leaded and unleaded gasoline use is available on the public-use microdata product only. ->HORSEPOWER This item was deleted from the questionnaire and data will not be available. ->CUBIC INCH DISPLACEMENT (CID) This item was deleted from the questionnaire, but the published data were derived from an analysis of the administrative record data and are included in the tables. "Not reported" indicates those trucks for which the CID are unknown. ->NUMBER OF CYLINDERS The published data were derived from an analysis of the administrative record data and are included in the tables. "Not reported" indicates those trucks for which cylinders are unknown. => TERMS ->BOBTAIL. Owners of large trucks who reported the vehicle was usually operated as a straight truck or truck tractor pulling a trailer were asked to report the approximate percentage of 1992 mileage that no trailer was pulled. This information is available on the public-use microdata product only. ->BODY TYPE. This category includes the type of body that is either permanently attached to the power unit (i.e., straight or single-unit truck) or most frequently used with a truck tractor as a tractor-trailer combination. ->BRAKES. An "other" category was added as a separate response to determine other types of brakes. ->CUBIC INCH DISPLACEMENT (CID). This item was deleted from the questionnaire, but the published data were derived from an analysis of the administrative record data and are included in the tables. "Not reported" indicates those trucks for which the CID are unknown. ->ENGINE TYPE. Separate responses for leaded and unleaded gasolines were developed to determine fuel use by engine. Published results of engine type are cited for "gasoline" only. Leaded and unleaded gasoline use is available on the public-use microdata product only. ->EXTERIOR LENGTH OF TRAILER(S). Owners of large trucks who reported the vehicle was usually operated as a straight truck or truck tractor pulling one or more trailers were asked to report the exterior length of the individual trailer(s) most often pulled. This information is available at the U.S. level and on the public-use microdata product only. ->HORSEPOWER. This item was deleted from the questionnaire and data will not be available. ->MINIVANS. The minivan universe includes vehicles which are manufactured on a truck or passenger car chassis. ->NUMBER OF CYLINDERS. The published data were derived from an analysis of the administrative record data and are included in the tables. "Not reported" indicates those trucks for which cylinders are unknown. ->OVERALL LENGTH. Separate check box ranges were developed for length to replace 1987 specific response. ->PIGGYBACK, CONVENTION TRAILERS OR CONTAINERS. A separate category for conventional trailers was added to complete inclusion of all intermodal equipment haul types. This information is available on the public-use microdata product only. ->TRAILER/AXLE CONFIGURATION. Owners of large trucks who reported the vehicle was usually operated as a straight truck or truck tractor pulling one or more trailers were asked to report the appropriate percentage of 1992 mileage of the trailer/axle configuration most often pulled. ->VEHICLE SIZE. This size classification is based on the average vehicle weight (empty weight of the vehicle plus the average weight of the load carried) at which the vehicle operated during 1992. The four size classes are: LIGHT. Average vehicle weight of 10,000 pounds or less. MEDIUM. Average vehicle weight of 10,001 to 19,500 pounds. LIGHT-HEAVY. Average vehicle weight of 19,501 to 26,000 pounds. HEAVY-HEAVY. Average vehicle weight of 26,001 pounds or more. ->WIDTH OF TRAILER. Separate check box ranges were developed for width to replace 1987 specific response. This information is available on the public-use microdata product only.