1. Developing Regional Solutions
Southeast Michigan Council of Governments

2. Jilan Chen & Liyang Feng Transportation Modeling Program
Detroit region travel changes: A Comparison of two household surveys
Jilan Chen & Liyang Feng
Transportation Modeling Program

3. 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

4. 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)

5. 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

6. Household Trip Rates by Purpose

7. Person Trip Rates by Purpose

8. 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%

9. Telecommuting Changes

10. Home-Based-Shopping Trips

11. Employment Changes in Selected Sectors

12. 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%

13. 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

14. 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

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