State Department of Transportation, and Portland Metro (the The Oregon Department of Transportation, the Washington The data were collected on behalf of the Port of Portland, Was initiated in the metropolitan Portland, Oregon, region. In 2005, a comprehensive freight data collection program Portland Freight Data Collection ProgramâPort of Some of the questions require input from the driver and oth-Įrs are based only on the interviewerâs observations (4). Numeric entry (e.g., number of axles).â¢įigure 2 presents example of these questions. Text entry (e.g., description of the location at which the ⢠This reduced costsīy avoiding manual data entry and coding and increasedĪccuracy by reducing the likelihood of key entry errors afterĬhoose one (e.g., the location at which the survey was ⢠PDA allowed for direct entry of the data into an electronicĭatabase and the automatic data coding. Of particular note is the use of a PDA for both surveys. Some port-specific questions also were included. Savannah surveys to expedite data collection and to allowįor localized differences in truck origin-destination patterns. Maker (who chooses the route), and load type/vehicleĪ shorter questionnaire was used for the two Port of Type, load status, commodity type, routing decision. Use, purpose, origin facility type, destination facility Trip information: origin, destination, frequency, roads ⢠Truck configuration, trailer style, hazardous materials Vehicle information: number of axles, number of units, ⢠Specific requirements of the GDOT truck lanes study, and toĬapture data on commodity type and category. Some modifications were made to address the To further coordinate efforts and facilitate the sharing of sur. The GDOT survey was based on the ARC survey in order The daily truck volumes at the weigh station sites and 14.9% A total of 3,636 trucks was sampledĪt the 10 sites: these represented between 4.0% and 15.8% of These were used as the basis for expanding Twenty-four hour counts were conducted at the same timeĪs the surveys. Two gates to the Port of Savannah, given the high volume of Survey that was conducted just prior to the GDOT surveysīy the Atlanta Regional Council (ARC) in and around theĪtlanta metropolitan area. Tion across the state, and to avoid duplication with a similar Locations were also selected to provide a geographic distribu. Stations along high-volume truck Interstate highways. The surveys were conducted at eight weigh The Georgia Department of Transportation (GDOT) con-ĭucted a series of roadside origin-destination surveys inĢ006 as part of a statewide study to identify the need for Statewide Truck Lanes Needs Identification Studyâ Survey type each of the surveys included presents a different Case studies are presented individuallyįor some survey types, and in others surveys are combined Ways, depending on the type of survey and on the availability It should be noted that the surveys are presented in two In addition, the last section presents aĬomparison of surveys from the literature. Theĭetails are taken from material provided by practitioners andįrom the literature. With details of actual surveys and their characteristics. Practitionersâ survey that were described in chapter three The presentation complements the findings of the This chapter presents case studies for several types of sur. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages. Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book.
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