This study was originally provided by ICPSR. ICPSR provides leadership and training in data access, curation, and methods of analysis for a diverse and expanding social science research community.
Principal Investigator(s): Casas, Jesse, NuStats
The 2002 Treasure Valley Transportation Survey was conducted in the counties of Ada and Canyon in southwest Idaho, under contract to the Community Planning Association of Southwest Idaho (COMPASS). The full Study was conducted during the months of September and October 2002 and entailed the collection of activity and travel information for all household members, regardless of age, during an assigned 24-hour period (Tuesday, Wednesday, or Thursday). The project included a two-stage procedure. The first stage involved a recruitment telephone interview to collect demographic information from the household, such as income, household size, and age and employment status of all persons in the household. The travel day was also assigned during the recruitment interview. The second stage consisted of a retrieval telephone interview to collect all travel information for the assigned travel day.
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Casas, Jesse. Treasure Valley Transportation Survey, 2002. ICPSR34698-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2013-06-26. doi:10.3886/ICPSR34698.v1
Persistent URL: http://doi.org/10.3886/ICPSR34698.v1
Scope of Study
Smallest Geographic Unit: ZIP Code
Date of Collection:
Unit of Observation: individual, household
Universe: The universe for the Survey was defined as all households with operational landline telephones located within the two counties of Ada and Canyon. According to the 2000 United States Census, there are 158,426 households located within this study area of which 113,408 (72 percent) are located in Ada County and 45,018 (28 percent) are located in Canyon County.
Data Types: survey data
Data Collection Notes:
For additional information, please refer to the Metropolitan Travel Survey Archive Web site.
Sample: Both listed and unlisted telephone numbers were generated using a modified random digit dial (RDD) procedure. Listed numbers were randomly selected in the study area. After identifying all of the area code/exchange and block combinations within the list (i.e., the first eight numbers within a ten-digit phone number), NuStats then generated all the possible combinations of telephone numbers within these exchanges and blocks. All randomly generated unlisted telephone numbers that were listed in the database were purged from the sampling frame. In all, 30,000 total telephone numbers were generated into 100 replicates (note that only 83 replicates were dialed). For additional information, please refer to the Original P.I. Documentation section of the ICPSR codebook.
You can find more information via the sample characteristics utility:
Weight: The data contain several weight variables that users may wish to use in analysis. For additional information, please refer to the Original P.I. Documentation section of the ICPSR codebook.
Mode of Data Collection: computer-assisted telephone interview (CATI), mail questionnaire
Response Rates: The response rate for this survey was 26 percent.
Extent of Processing: ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection:
- Checked for undocumented or out-of-range codes.
Original ICPSR Release: 2013-06-26
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