Developing Regional Solutions Southeast Michigan Council of Governments

Jilan Chen & Liyang Feng Transportation Modeling Program Detroit region travel changes: 2005-2015 A Comparison of two household surveys Jilan Chen & Liyang Feng Transportation Modeling Program

SEMCOG Area Seven counties 4,600 square miles 23,000 miles of major roadway 12,600 households surveyed in 2015 6,400 households surveyed in 2005

Regional Socio-economic Changes SE Changes 2005 2015 Difference % Diff # of HHs 1,926,099 1,819,119 (106,980) -6% # of People 4,891,131 4,372,705 (518,426) -11% # of Workers 2,297,584 2,184,666 (112,918) -5% Licensed Drivers 3,367,487 3,098,054 (269,433) -8% # of Autos 3,519,487 3,252,589 (266,898)

Regional Travel Changes: 2005 - 2015 HH Travels 2005 2015 % Diff HH Size 2.54 2.40 -5% Trips / HH 9.60 9.06 -6% Workers / HH 1.19 1.20 1% HBSH Trips / HH 0.91 0.80 -12%   Trips/Person 3.78 3.77 0% HBW Trips Per Worker 1.22 1.21 -1% HBSH Trips / Person 0.36 0.33 -7% Autos Per Driver 1.05

Household Trip Rates by Purpose

Person Trip Rates by Purpose

Trips per Person by County 2005 2015 % Diff 1 - Detroit 3.28 3.52 7.3% 2 - Out Wayne 3.85 3.73 -3.2% 3 - Oakland 3.97 3.86 -2.7% 4 - Macomb 3.78 0.1% 5 - Washtenaw 4.12 3.96 -3.9% 6 - Monroe 3.77 3.75 -0.4% 7 - St. Clair 3.79 1.8% 8 - Livingston 3.69 -1.6% SEM Region -0.3% STD 0.24 0.13 -44.6%

Telecommuting Changes

Home-Based-Shopping Trips

Employment Changes in Selected Sectors

Senior Household Travels: 65+ Years Old Travel Characteristics 2005HHS 2015HHS % Difference Avg. HH Size 1.39 1.54 10% FT Workers Per HH 0.06 0.20 236% PT Workers Per HH 0.10 0.01 -92% Vehicles Per HH 1.21 1.60 33%   Total Trips Per HH 4.64 6.45 39% HBW Trips Per HH 0.24 21% HBSH Trips Per HH 0.85 0.98 15% Trips/Person 3.34 4.20 26% HBW Trips/Person 0.14 0.15 9% HBW Trips/Worker 1.12 -8% HBSH Trips/Person 0.61 0.64 5%

Travels for HHs with 2 Adults and 2 Children Travel Characteristics 2005HHS 2015HHS % Difference Avg. HH Size 4.00 0% FT Workers Per HH 1.28 1.52 18% PT Workers Per HH 0.32 0.13 -60% Vehicles Per HH 2.28 2.33 2%   Total Trips Per HH 16.18 15.04 -7% HBW Trips Per HH 1.91 1.90 -1% HBSH Trips Per HH 1.01 0.78 -23% Trips/Person 4.04 3.76 HBW Trips/Person 0.48 HBW Trips/Worker 1.19 1.15 -3% HBSH Trips/Person 0.25 0.19

Modeling Implication Consider age factors Explore more trip rate variation in different areas & trip generation stratifications. Tour analysis to consider NHB impact Link retail employment forecast with HBSH trips Possible to consider both 2005 & 2015 surveys in future model development

Contact: Jilan Chen: chen@semcog.org Liyang Feng: feng@semcog.org