Southeast Michigan Council of Governments (SEMCOG) Household-Based Person Trip Survey, 1994 (ICPSR 34911)
Version Date: Dec 16, 2013 View help for published
Principal Investigator(s): View help for Principal Investigator(s)
Burton Ehrmann, Southeast Michigan Council of Governments
Series:
https://doi.org/10.3886/ICPSR34911.v1
Version V1
Summary View help for Summary
The Southeast Michigan Council of Governments (SEMCOG) is the designated Metropolitan Planning Organization (MPO) for the southeast region of Michigan. This region encompasses the counties of Oakland, Macomb, Monroe, Livingston, St. Clair, Washtenaw, and Wayne (including the City of Detroit). Created in 1968, SEMCOG's planning responsibilities include the collection and maintenance of a comprehensive transportation, demographic, environmental, and economic development database for advancing regional policies and plans, and review and approval of applications for federal transportation funds. The 1994 survey was undertaken to provide SEMCOG with new travel behavior data to assist in updating the region's transportation models. This data collection includes socioeconomic, travel, and mobile source emissions models for projecting future patterns of development, travel, congestion, and air pollution. Information about household characteristics and travel was collected using a one-day, activity-focused diary and a separate household survey. In an activity diary, respondents were asked about each activity they undertook during the day. Travel was assessed as the process of getting from one activity to another. Therefore, the trips reported in this document were generated by pairing activities to form a trip origin and destination. Demographic information includes age, gender, number and age of children, school enrollment status, employment status, occupation, household income, and type of household dwelling.
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Subject Terms View help for Subject Terms
Geographic Coverage View help for Geographic Coverage
Smallest Geographic Unit View help for Smallest Geographic Unit
Traffic Analysis Zone (TAZ)
Distributor(s) View help for Distributor(s)
Time Period(s) View help for Time Period(s)
Date of Collection View help for Date of Collection
Data Collection Notes View help for Data Collection Notes
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Originally, the data were comprised of three data files: (1) a Household File, (2) a Person File, and (3) a Travel Characteristics File. These three files were combined into one data file provided to ICPSR.
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There are date discrepancies between the data, the Original P.I. Documentation, and the dates provided by the P.I. when the collection was deposited to ICPSR. The dates indicated in the metadata fields "Time Periods and Time Frames" and "Collection Dates and Time Frames" are those provided to ICPSR when the collection was deposited. No additional information was provided.
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For additional information regarding the Southeast Michigan Council of Governments (SEMCOG) Household-Based Person Trip Survey, please visit the Metropolitan Travel Survey Archive Web site and the SEMCOG Web site.
Study Purpose View help for Study Purpose
The primary objective of the household-based travel survey was to provide up-to-date information for re-estimating all components of the Southeast Michigan Council of Governments regional travel model. A second objective of the survey was to collect reliable information on off-peak travel patterns, particularly non-work related travel, so that the travel activity during these periods could be better understood.
Study Design View help for Study Design
The survey procedures were:
(1) Recruitment - Households were recruited using a computer-aided telephone interviewing system (CATI). Participating households were assigned a diary day that was the same day of the week as their telephone recruitment call. During the recruitment call, the characteristics of the household were collected, including household size, vehicles available, and geographic location, in order to place the household in the correct cell of the sampling matrix.
(2) Materials Mailing - For those households agreeing to participate, the survey team assembled a package containing: a cover letter from the Southeast Michigan Council of Governments introducing the study; a fact sheet explaining the overall research effort; a household information form; a One-Day Diary for each member of the household five years of age or older; and a one dollar bill incentive per household.
(3) Reminder Call - The night before their assigned diary day, recruited households were telephoned to verify that they had received their package of materials, to remind them of the survey, and to answer questions.
(4) Retrieval Call - During the retrieval call, the household form and diary information data were collected for all members of the household. Since the calls were made using computer-aided telephone interviewing, the data were simultaneously entered into a database.
There are copies of instruments, telephone scripts, and survey expansion methodology in the Original P.I. Documentation section of the ICPSR Codebook.
Sample View help for Sample
A stratified sample was used to conduct the survey. For additional information regarding sampling, please refer to the Original P.I. Documentation section of the ICPSR Codebook.
Time Method View help for Time Method
Universe View help for Universe
Households within the Southeast Michigan Council of Governments region which includes Wayne, Oakland, Macomb, Monroe, Livingston, St. Clair, and Washtenaw counties in Michigan and includes the City of Detroit.
Unit(s) of Observation View help for Unit(s) of Observation
Mode of Data Collection View help for Mode of Data Collection
Description of Variables View help for Description of Variables
Specifically, the questionnaire collected two types of data: census variables such as the number of persons per household, age, sex, employment status, occupation and income; and transportation related variables including trip origin and destination, trip purpose, travel time, mode of travel used, and vehicle occupancy.
Response Rates View help for Response Rates
The response rate for the study was 21 percent.
HideOriginal Release Date View help for Original Release Date
2013-12-16
Version History View help for Version History
2018-02-15 The citation of this study may have changed due to the new version control system that has been implemented. The previous citation was:
- Ehrmann, Burton. Southeast Michigan Council of Governments (SEMCOG) Household-Based Person Trip Survey, 1994. ICPSR34911-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2013-12-16. http://doi.org/10.3886/ICPSR34911.v1
2013-12-16 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.
Notes
These data are freely available to data users at ICPSR member institutions. The curation and dissemination of this study are provided by the institutional members of ICPSR. How do I access ICPSR data if I am not at a member institution?