Freight Transportation Surveys (2011) / Chapter Skim
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From page 40... ...
The collected data comprised -- Vehicle information: number of axles, number of units, • truck configuration, trailer style, hazardous materials status, and state of registration. Trip information: origin, destination, frequency, roads • use, purpose, origin facility type, destination facility type, load status, commodity type, routing decisionmaker (who chooses the route)
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border crossings. They focus on inter-urban trips.
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. FIGURE 3 Roadside Intercept Truck Survey Form -- Portland region.
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.] FOCUS AND STAKEHOLDER GROUP SURVEYS -- FREIGHT STUDIES A number of organizations conducting freight transportation surveys or freight studies collect qualitative information alone, or in addition to, quantitative data.
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The survey includes open-ended questions asking respondents to note what efforts would improve their experiences, or encourage them to shift to another mode of transportation. These types of surveys attempt to gather anecdotal information about the strengths and weaknesses of the freight transportation network and assess what investments would be most
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[Source: Multi-County Goods Movement Action Plan: Technical Memorandum 2b: Public Outreach -- Survey No. 2 Report (16)
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For the Kansas DOT's Statewide Freight Study, three surveys were administered: one for shipper/receivers, one for carriers, and one for public agencies. Questions were tailored to each group, but all asked about modes of choice and the performance of the freight transportation network (18)
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[Source: Arizona Multimodal Freight Analysis Study, Technical Memorandum #1, Analysis of Arizona's Freight Dependent Industries (17)
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The development of specific LOS factors for the trucking community reflected the unique size and operating characteristics of large trucks: in turn, these factors could be used to assess how well the statewide road system meets the needs of freight transportation. The study sought input from two stakeholder groups: truck drivers ("the most important group concerning truck LOS, in that they are the ones who actually drive the trucks on the road")
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47 (An initial sample frame for the latter included businesses that did not necessarily own commercial trucks; however, this resulted in a high number of ineligible [i.e., inapplicable] cases, and so the scope was narrowed in order to generate a usable response.)
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The report includes the CATI and web surveys. COMMERCIAL TRIP DIARY SURVEYS Employee Business Trip Log -- Ohio The 2003–2004 Ohio Statewide General Establishment Survey included a commercial trip diary survey.
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survey of freight distributors. That survey included a 3-day vehicle trip diary survey, which was administered to drivers of the vehicles of the seven surveyed freight distributors.
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The large number of stops made by some firms required the assistance of the researchers to accompany the drivers and fill out the survey forms themselves. ESTABLISHMENT SURVEYS Portland Freight Data Collection Program -- Port of Portland et al.
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.] Establishment Survey -- Ohio An establishment survey was conducted as part of the Ohio statewide freight data collection initiative in 2003.
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Each combined an establishment survey with an origin-destination survey of truck drivers. FIGURE 14 Goods vehicle trip diary, third page -- Ireland.
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53 were deemed to be eligible. Of the contacted establishments, 13,792 were determined to be eligible, and of these 4,324 agreed to participate in the survey.
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.] gary, a sample of 49,354 companies, approximately 3.4% of the sample could not be reached because of incorrect telephone numbers (for initial contact and recruitment)
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Data are provided on tons, miles, ton-miles, value, shipment distance, commodity type, and weight. All major modes of freight transportation are captured (43)
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INTELLIGENT TRANSPORTATION SYSTEMS TECHNOLOGIES GPS have been used in recent years to provide detailed and accurate data on vehicle location and speeds. A 2008 paper cited several potential benefits of GPS "to supplement, and eventually replace, data collected from roadside surveys," as follows (11)
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Disadvantages include limited coverage in rural areas and on Interstate highways, less precise locating capabilities than satellite GPS (50–150 meters) , and multisystem interoperability problems.
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technology to collect vehicle license plates from trucks accessing selected terminals at the ports of Los Angeles and Long Beach. The purpose of the data collection was to develop an initial estimate of heavy-heavy-duty diesel truck activity and population, for application to the San Pedro bay Ports Clean Air Action Plan.
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• Self-completion (post, fax, or e-mail with initial and reminder phone call) • Self-completion (left and collected in person)
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Difficult to ensure that right person in • organization will respond No way of knowing whether respondent • understood question in way intended No opportunity to check/clarify or discuss • responses Difficult to interpret nonresponses to • questions Not good for open-ended questions• Self-completion with initial contact and reminder by phone call or in person (for wide range of survey techniques including establishment, commodity flow, vehicle operator, shipper, and service provider surveys) Lower cost method than interviews -- • effective method Can provide better response rate than • basic self completion method Phone/in-person follow-up can allow • opportunity to clarify/discuss responses (but difficult to achieve in practice)
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From page 63... ...
However, they are expensive and time consuming. Telephone surveys have the same advantages as face-• to-face interviews, and though they are also time consuming they can provide a less expensive means of capturing a larger sample size (per unit cost)
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