Southeast Michigan Council of Governments

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Southeast Michigan Council of Governments
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Ten Years LaterA Comparison of SEMCOG 1994 and
2004 Household Survey Data

• Stephanie J. Taylor and Li-yang Feng
• Southeast Michigan Council of Governments
• 11th TRB Applications Conference
• Daytona Beach, FL
• May, 2007

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(No Transcript)
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Project Partners

• Michigan Department of Transportation (MDOT)
• Southeast Michigan Council of Governments
  (SEMCOG)
• MORPACE International
• Parsons Brinckerhoff (PB)
• Brogan Partners
• Parsons

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Background 1994

• Population and job growth in service and
  manufacturing industries
• ISTEA focus of transportation planning
• Last survey 1980 Regional Travel Survey
• Outward spread of households and jobs across
  the region

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Background 2004

• Southeast Michigan experiencing migration and
  suburban growth
• Increased local government participation in
  planning through TEA-21
• Last survey 1994 Household Survey
• Aging transportation infrastructure system forces
  project prioritization

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Survey Goals 1994 and 2004

• Increase understanding of current travel patterns
• Improve ability of travel model to forecast
  volumes
• Identify regional demographic trends including
  migration and housing

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Project Objectives 1994

• Survey 7,000 households in Southeast Michigan
• Combine with other surveys external station,
  truck, and transit
• Conduct to guide the expenditure of federal
  transportation funds in the area

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Project Objectives 2004

• Survey 6,000 households in Southeast Michigan
• Update database of travel behavior patterns to
  use to refine the travel model
• Enhance ability to test alternative solutions to
  transportation problems

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Survey Method 1994 and 2004

• Stratified by county and Detroit
• Random-digit-dialing (RDD)
• Capture households with transit riders (2004)
• Prior residence and housing unit type (2004)
• One-day diary
• Computer-aided telephone interview (CATI)
• Activity-based design

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1994 Survey Instrument

• Household Survey

• One-Day Diary

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2004 Survey Instrument

• One-Day Diary

• Household Survey

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Household Data

• Household size
• Number of workers
• Vehicles available
• Information on residence

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Regional Travel StatisticsDemographics
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Regional Travel StatisticsDemographics (cont.)
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Person Data

• Gender
• Age
• Licensed driver

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Gender of 1994 and 2004 Survey Participants
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Household Population Age Ranges by Gender 1994
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Household Population Age Ranges by Gender 2004
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Planning Implications of Aging Population

• Track the Baby Boomer cohort
• Transport seniors with varied transportation
  needs
• Transform planning and modeling to address
  socioeconomic changes
• Tackle human factors and driver behavior issues

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Trip Data

• Travel time
• Trip length
• Vehicle occupancy
• Trip purpose

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Example of Travel Day
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Trip Summary
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Trip Generation RatesHBW
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Trip Distribution by Trip Purpose
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Reasons for No Travel on the Survey Day 1994

• Homebound
• Temporary illness
• Full-time homemaker
• Vacation day/day off
• Work at home
• Out of town
• Poor weather

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Reasons for No Travel on the Survey Day 2004

• No reason to go out
• Age or illness limitations
• Weather concerns
• Baby/babysitting
• Car problems

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Reasons for Longer Trip Length 2004

• Traffic congestion
• Construction
• Weather
• Accident

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Summary of Regional Trends
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Southeast Michigan Council of Governments
www.semcog.org