Vermont Trip Generation Manual

Like many other states and municipalities, Vermont requires that developers prepare a Traffic Impact Study for proposed developments. A Traffic Impact Study is an evaluation of the congestion and safety effects of a particular development on its surrounding and supporting transportation infrastructure. It is performed to ascertain if a development will have an adverse impact on its surrounding and supporting transportation infrastructure and, if so, how that impact can be ameliorated. A critical portion of a Traffic Impact Study is estimating the amount of traffic that a proposed development will produce. This estimate is obtained by carrying out a Trip Generation analysis. The basic unit of measure of impact is the trip, a one-way movement into or out of a particular land use. The number of trips that a proposed development will produce is based on the type of land use and its intensity. Types of land use include housing, retail, institutional and services, among others. The intensity of land use indicates some measure of size, such as area, number of seats in a restaurant or number of pumps at a filling station. The Institute of Transportation Engineers (ITE) has been collecting data on Trip Generation for a number of years and publishes its Trip Generation Manual, now in its seventh edition, This manual contains Trip Generation rates and equations which relate the number of trips for a specific land use, defined by a Land Use Code (LUC), to some measure of land use intensity. In some cases, more than one measure of intensity is presented. The difficulty with the ITE manual is that most of the data was collected in suburban and small urban areas, which are not representative of rural areas, such as Vermont. Therefore, the purpose of the research is to measure Trip Generation for the most widely proposed types of development in Vermont and relate it to some measures of the intensity of the particular land uses. The result of the research would be a Vermont Trip Generation Manual to be used in conjunction with the preparation and review of Traffic Impact Studies within the state. This could very well be the springboard for similar research in other rural parts of the country to provide a general rural Trip Generation Manual. The work will be divided into two phases: Data Collection and Data Analysis. Data Collection would consist of counting vehicles entering and exiting from various types of development. Data Analysis would consist of calculating Trip Generation rates for the various land uses and, where enough data exists, deriving equations relating the intensity of land use to trip making propensity.


    • English


    • Status: Completed
    • Funding: $201200.00
    • Contract Numbers:

      SPR 700

    • Sponsor Organizations:

      Vermont Agency of Transportation

      Materials and Research Section
      1 National Life Drive, Drawer 33
      Montpelier, VT  United States  05633
    • Project Managers:

      Byrne, Bernard

    • Performing Organizations:

      Vermont Agency of Transportation

      Materials and Research Section
      1 National Life Drive, Drawer 33
      Montpelier, VT  United States  05633
    • Principal Investigators:

      Byrne, Bernard

    • Start Date: 20071001
    • Expected Completion Date: 0
    • Actual Completion Date: 20100601
    • Source Data: RiP Project 14723

    Subject/Index Terms

    Filing Info

    • Accession Number: 01464800
    • Record Type: Research project
    • Source Agency: Vermont Agency of Transportation
    • Contract Numbers: SPR 700
    • Files: RiP, STATEDOT
    • Created Date: Jan 3 2013 2:49PM