1. presentationA Explore Detroit Region Trip Chaining Behavior Presented by Liyang Feng & Jilan Chen Southeast Michigan Council of Governments The 12 th TRB Transportation Planning Applications Conference Houston, TX May 17-21, 2009

2. presentationA SEMCOG Region in 2005 Seven counties: Wayne, Washtenaw, Oakland, Macomb, Livingston, St. Clair, and MonroeSeven counties: Wayne, Washtenaw, Oakland, Macomb, Livingston, St. Clair, and Monroe Employment: 2.16 millionsEmployment: 2.16 millions Population: 4.83 millionsPopulation: 4.83 millions Households: 1.85 millions Population:Households: 1.85 millions Population: Estimated week day vehicle trips: 18.0 millionsEstimated week day vehicle trips: 18.0 millions Regional VMT: 137.5 millionsRegional VMT: 137.5 millions

3. presentationA Challenges in SEMCOG Region Declining manufactory industryDeclining manufactory industry Higher unemployment rate (7.6% vs. 11.6%)Higher unemployment rate (7.6% vs. 11.6%) Declining housing marketDeclining housing market Declining regional travelDeclining regional travel

4. presentationA

5. A Manufacturing Employment

6. presentationA Total Wage/Salary Employment (-341,300, or -14.2%)

7. presentationA

8. A Regional VMT 2002-2008 Average daily VMT reduced 8.6%Average daily VMT reduced 8.6% Average weekday traffic reduced 7.5%Average weekday traffic reduced 7.5% 2007-2008 average traffic reduced 2.7%2007-2008 average traffic reduced 2.7% Traffic declined more over the weekendsTraffic declined more over the weekends

9. presentationA 2005 Regional Travel Survey Part of the Michigan statewide travel behavior data collection effort.Part of the Michigan statewide travel behavior data collection effort. Covered SEMCOG seven county regionCovered SEMCOG seven county region 6,000 HHs plus 600 transit oriented HHs surveyed6,000 HHs plus 600 transit oriented HHs surveyed Activity based survey for future needsActivity based survey for future needs Completed in mid-2005Completed in mid-2005

10. presentationA Survey Data Applications Support current modeling needs:Support current modeling needs: –refresh existing travel models (E5 version) –Improve transit and mode choice models (E6 version) Provide regional travel behavior snapshotProvide regional travel behavior snapshot Prepare for future ABM developmentPrepare for future ABM development

11. presentationA Prepare for Activity Based Modeling Explore general travel characteristicsExplore general travel characteristics Explore trip chaining characteristicsExplore trip chaining characteristics How Detroit region differs from other metro areaHow Detroit region differs from other metro area

12. presentationA Trip and Tour Definition Three basic trip definition: HBW, HBO, NHBThree basic trip definition: HBW, HBO, NHB Tour definition: Tour, Sub TourTour definition: Tour, Sub Tour Primary mode of tourPrimary mode of tour Primary destinationPrimary destination

13. presentationA Tour Pattern Home Social Eat Meal Shop Work 7 6 1 5 4 2 3

14. presentationA Mode and Destination Primary mode: School bus, Park & Ride, W-Transit, Drive alone, Shared 2/3+, Bike, Walk, OtherPrimary mode: School bus, Park & Ride, W-Transit, Drive alone, Shared 2/3+, Bike, Walk, Other Primary destination: decision tree includes place, activity and timePrimary destination: decision tree includes place, activity and time

15. presentationA Analysis Reference Reference data provided by DRCOGReference data provided by DRCOG Denver Regional 1996 TBI: Activity based survey with 4,166 HHs plus 667 transit focused HHsDenver Regional 1996 TBI: Activity based survey with 4,166 HHs plus 667 transit focused HHs Different in population, area size and employment, and industriesDifferent in population, area size and employment, and industries Similar in survey designSimilar in survey design

16. presentationA Analysis Reference (cont.) Different RegionsDifferent Regions – population: 4.8 m Vs. 1.8 m –Households: 2.0 m Vs. 0.9 m –industries Similar in survey designSimilar in survey design

17. presentationA Data Processing Maintained similar variable definitionMaintained similar variable definition Maintained same tour and sub-tour definitionMaintained same tour and sub-tour definition Adopted same primary mode of tour and primary destination definition logic.Adopted same primary mode of tour and primary destination definition logic.

18. presentationA Number of Trips Per Tour

19. presentationA Location of Primary Destination

20. presentationA Activity at Primary Destination

21. presentationA Primary Mode of Tour

22. presentationA Duration of Primary Activity

23. presentationA Starting Place and Primary Destination

24. presentationA Initial Findings Two regions are almost identical on the distribution of primary mode of tour, and the distribution of number of trips per tourTwo regions are almost identical on the distribution of primary mode of tour, and the distribution of number of trips per tour Activities at primary destination are similar except for work activities. Detroit region has lower % than Denver regionActivities at primary destination are similar except for work activities. Detroit region has lower % than Denver region Duration of activities show a different distributionDuration of activities show a different distribution

25. presentationA ABM Implications Transferable model parametersTransferable model parameters More efficient surveysMore efficient surveys More efficient model development processMore efficient model development process Common platformsCommon platforms

26. presentationA Next Steps Explore and compare other travel characteristics in the regions, such as primary activities and number of trips distribution, temporal distribution of tours and activitiesExplore and compare other travel characteristics in the regions, such as primary activities and number of trips distribution, temporal distribution of tours and activities Compare 2005 survey to SEMCOG 1994 HH survey.Compare 2005 survey to SEMCOG 1994 HH survey.

27. presentationA Thank You Very Much Thank You Very Much