Highway Performance Monitoring System Case Study - Truck Weight
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Highway Performance Monitoring System Case Study - Truck Weight

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  • Alternative Title:
    Highway Performance Monitoring System Case Study Procedural Manual - Truck Weight
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    The Highway Performance Monitoring System (HPMS) has been designed and implemented as a continuing information system encompassing data collection, extensive data analysis and modeling, and historical recordkeeping. Basically, the HPMS will provide the Federal Highway Administration (FHWA) with the capability to: (1) periodically assess the extent and condition of the highway system, (2) monitor the performance of the highway systems on a continuing basis, {:S) calculate the impacts of existing highway programs and policies, and (4) forecast potential impacts of future alternative programs and policies. In addition HPMS will serve a host of other activities such as supporting various reports to the Congress; supporting day-to-day program and policy evaluations; satisfying routine planning data needs; responding to continuing inquiries and requests from the Administration, the Congress, and the public; and providing the nucleus for national studies such as the Highway Cost Allocation Study (HCAS). The data requirements for HPMS were established using a "top down" approach in which program and policy impacts of interest were identified, performance measures for each impact area were established and a minimum set of data necessary to derive the performance measures and describe the highway systems was defined. Having defined the required dataset, the most efficient and practical means of obtaining the required information was sought. It was decided that certain information such as mileage, travel, capital investments, bus usage and service, land area and population had to be obtained on a universe summary basis as general information and as control totals for sample expansion. Existing planning data reporting systems have been or are being modified to provide the required universe data. Required summaries are being reported on an interim basis as a part of the initial implementation of HPMS. Likewise it was decided that data describing most of the physical and operational characteristics of the highway systems could best be obtained by statistically sampling sections and expanding the values for these sections to represent the universe of mileage. To this end, each State was asked to establish rural, small urban and individual urbanized area panels of sections arid to report a majority of the required section specific data and all interim areawide data summaries by December 31, 1979. While the reporting of section specific data required for the panels of sections satisfies most of the HPMS need for section specific data, there is a limited amount of equally important and necessary cost/labor intensive data impractical to get on a section by section basis. This type of data will be obtained through case studies in which "typical or representative values will be established which can be applied to like sections in the panels of sections. Case studies to provide this type of data are concerned with vehicle occupancy, truck weight, and vehicle classification. Other case studies will be concerned with detailed data for analytical model development.
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