Clien

t N

am

e H

ere

- I

n T

itle

Maste

r S

lid

e

2007/2008 Household Travel Survey

Changes in Daily Travel Patterns1994 to 2007/2008

Robert E. GriffithsTechnical Services Director

National Capital Region Transportation Planning BoardMetropolitan Washington Council of Governments

March 17, 2010

Item 14

2

Change in Household Size(1994 – 2007/2008)

22%

33%

18%

26%

31% 31%

15%

23%

0%

10%

20%

30%

40%

50%

1-Person 2-Person 3-Person 4+-Person

1994 2007/2008

Percent

One of the most significant changes between 1994 and 2007/2008 was the increase in single person households

3

Change in Single Person Households by Jurisdiction (1994 – 2007/2008)

37%40% 42%

18%21%

17% 16%

10%

16%

9%

49%

43%46%

25%

32%

27%29%

22%20% 19%

0%

10%

20%

30%

40%

50%

60%

DC ARL ALX MTG PG FFX LDN PW FRD CHS

1994 2007/2008

1-Person Households as % of All Households

The proportion of single person households increased in all jurisdictions, with the largest increases in Loudoun County, Prince William County and the District of Columbia

4

Change in Average Number of Daily TripsPer Household (1994 – 2007/2008)

8.9

14.6

9.8

7.2

4.2

8.3

14.9

9.8

7.1

3.9

0.0 3.0 6.0 9.0 12.0 15.0 18.0

All Households

4+-Person HH

3-Person HH

2-Person HH

1-Person HH

2007/2008 1994

Average Number of Daily Trips

On average, single-person households make about 4 trips per day.

5

Effect of the Change in Household Size on Daily Trips Per Household

Because of the significant increase in the proportion of single person households the overall average number of daily trips per household dropped by about 7% between 1994 and 2007/2008.

6

Change in Average Number of Daily Trips Per Personby Age (1994 – 2007/2008)

3.7

3.3

3.7

4.0

4.2

4.1

3.7

2.8

3.6

3.1

3.3

3.7

4.2

4.1

3.7

3.3

0.0 1.0 2.0 3.0 4.0 5.0 6.0

5-65+

5-15

16-24

25-34

35-44

45-54

55-64

65+

2007/2008 1994

Daily Trips Per Person18% Increase for Persons 65+

8% Decrease

9% Decrease

5% Decrease

7

Change in Daily Trip Rates by Purpose for Persons 65+ (1994 – 2007/2008)

2

8

4

22

21

22

44

70

89

0

3

7

26

27

33

51

81

106

0 20 40 60 80 100 120

School

Work-Related

Pick-Up/Drop Off

Work

Eat Meal

Other

Social/Rec

Personal Bus

Shop

2007/2008 1994

Number of Daily Trips per 100 Persons 65+

Shopping, Personal Business and Other were the trip purpose categories with the largest increases.

8

Change in Daily Trip Rates by Purpose for Persons Age 5 to 15 (1994 – 2007/2008)

164

1

22

1

15

13

65

17

29

145

0

11

0

17

20

54

29

36

0 20 40 60 80 100 120 140 160 180

School

Work-Related

Pick-Up/Drop Off

Work

Eat Meal

Other

Social/Rec

Personal Bus

Shop

2007/2008 1994

Number of Daily Trips per 100 Persons 5 to 15

School, Social/Recreation and Pick Up/Drop Off were the trip purpose categories with the greatest decreases

9

Change in Daily Trip Rates by Purpose for Persons Age 16 to 24 (1994 – 2007/2008)

59

14

8

88

29

16

82

25

47

86

4

9

64

27

17

45

30

51

0 20 40 60 80 100

School

Work-Related

Pick-Up/Drop Off

Work

Eat Meal

Other

Social/Rec

Personal Bus

Shop

2007/2008 1994

Number of Daily Trips per 100 Persons 16 to 24

The Social/Recreation trip rate dropped by almost one half.

10

Change in Daily Trip Rates by Purpose for Persons Age 25 to 34 (1994 – 2007/2008)

9

28

27

142

31

18

48

38

57

8

9

21

138

29

25

36

33

67

0 20 40 60 80 100 120 140 160

School

Work-Related

Pick-Up/Drop Off

Work

Eat Meal

Other

Social/Rec

Personal Bus

Shop

2007/2008 1994

Number of Daily Trips per 100 Persons 25 to 34

Daily trip rates dropped in all trip purpose categories, except shopping and other

11

Change in Average Number of Daily Trips per Person (1994 – 2007/2008)

Although the number of trips per household has dropped by 7% the number of daily trips per person showed a much smaller 2% decline.

Nonetheless, significant changes in the average number of daily trips per person were observed for different age groups.

Per person daily trip rates remained the same for persons between the ages of 35 and 64

Rates decreased moderately for persons from 5 to 34 Rates significantly increased for persons 65+

Change in Modal Share of Daily Trips 1994 to 2007/2008

Age Auto Driver

Auto Passenger Transit Walk Bike Other

5-15 0.0% 2.4% 1.0% -0.2% -0.3% -2.8%

16-24 -6.9% 0.9% 2.3% 0.9% -0.1% 2.9%

25-34 -6.4% -0.7% 2.3% 4.6% 0.5% -0.2%

35-44 0.9% -3.9% -0.2% 2.8% 0.4% 0.0%

45-54 2.5% -3.8% 0.6% 0.8% 0.3% -0.4%

55-64 -6.6% -1.1% 3.8% 3.4% 0.6% 0.0%

65+ 0.2% 0.0% -0.5% -0.4% 0.2% 0.5%

5-65+ -2.2% -0.5% 0.7% 1.6% 0.2% 0.2%

12

13

Travel Mode of Daily Trips by Age(Percent by Mode of Travel) (2007/2008)

61.1

47.2

66.7

76.2

77.7

73.6

74.2

17.4

60.2

26.7

8.7

6.6

8.5

15.7

2.3

8.6

6.1

6.8

10.0

13.2

9.5

11.2

8.2

24.2

5.3

3.1

7.9

10.3

6.3

5.4

13.4

9.0

5.1

8.0

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

5-65+

5-15

16-24

25-34

35-44

45-54

55-64

65+

Auto DAuto PTransitWalk/BikeSch Bus/Oth

Source: TPB 2007/2008 Household Travel Survey

14

Change in the Modal Distribution of Daily Trips by Age (1994 – 2007/2008)

The auto driver vehicle trip modal share of daily trips dropped by 2.2 percentage points and auto passenger share declined by 0.5 percentage points.

The transit share of daily trips increased by 0.7 percentage points and the walk share increased by 1.6 percentage points.

The bike and other mode shares increased by 0.2 percentage points.

Region wide:

Travel Mode of Daily Trips by Age in Core Jurisdiction Activity Centers (2007/2008)

Age

% Live in Activity Center

Auto Driver

Auto Passenger Transit Walk Bike Other

5-15 10% 0% 54% 4% 24% 0.0% 18.4%

16-24 24% 26% 10% 22% 37% 0.0% 5.3%

25-34 31% 38% 8% 19% 32% 0.7% 2.0%

35-44 21% 44% 6% 15% 32% 2.2% 0.9%

45-54 20% 42% 6% 21% 28% 2.5% 0.7%

55-64 21% 42% 10% 16% 29% 0.3% 2.1%

65+ 21% 47% 7% 17% 25% 1.5% 2.7%

5-65+ 22% 39% 9% 18% 30% 1.2% 2.6%

15

Travel Mode of Daily Trips by Age in Core Jurisdiction Outside of Activity Centers (2007/2008)

Age

% Live Outside Activity Center

Auto Driver

Auto Passenger Transit Walk Bike Other

5-15 90% 0% 48% 12% 28% 1.5% 10.0%

16-24 76% 34% 16% 27% 17% 0.8% 5.5%

25-34 69% 48% 6% 20% 23% 1.2% 1.6%

35-44 79% 56% 5% 13% 21% 2.5% 1.8%

45-54 80% 58% 8% 16% 14% 1.6% 1.3%

55-64 79% 60% 7% 14% 17% 0.7% 0.8%

65+ 79% 65% 12% 9% 12% 0.5% 2.0%

5-65+ 78% 49% 12% 15% 19% 1.4% 2.6%16

Travel Mode of Daily Trips by Age in Inner Suburb Activity Centers (2007/2008)

Age

% Live in Activity Center

Auto Driver

Auto Passenger Transit Walk Bike Other

5-15 4% 0% 60% 3% 9% 0.0% 27.8%

16-24 5% 49% 15% 13% 18% 1.5% 3.5%

25-34 12% 69% 11% 8% 11% 0.6% 0.0%

35-44 7% 74% 7% 8% 10% 0.6% 0.6%

45-54 5% 67% 7% 10% 13% 0.5% 2.5%

55-64 5% 68% 4% 12% 14% 0.3% 1.4%

65+ 5% 64% 14% 6% 14% 0.0% 1.8%

5-65+ 6% 61% 14% 9% 12% 0.5% 3.8%

17

Travel Mode of Daily Trips by Age in Inner Suburbs Outside of Activity Centers (2007/2008)

Age

% Live Outside

Activity Center

Auto Driver

Auto Passenger Transit Walk Bike Other

5-15 96% 0% 66% 1% 10% 0.9% 22.5%

16-24 95% 49% 31% 6% 6% 0.7% 7.4%

25-34 88% 75% 10% 7% 7% 0.7% 0.7%

35-44 93% 79% 6% 7% 7% 0.3% 0.6%

45-54 95% 81% 6% 7% 6% 0.3% 0.5%

55-64 95% 79% 8% 7% 5% 0.4% 0.8%

65+ 95% 76% 17% 2% 4% 0.2% 0.8%

5-65+ 94% 64% 19% 5% 7% 0.5% 4.6%18

Travel Mode of Daily Trips by Age in Outer Suburb Activity Centers (2007/2008)

Age

% Live in Activity Center

Auto Driver

Auto Passenger Transit Walk Bike Other

5-15 5% 0% 53% 0% 9% 0.0% 37.5%

16-24 7% 60% 29% 0% 8% 0.0% 3.5%

25-34 9% 86% 12% 1% 1% 0.0% 0.0%

35-44 6% 87% 3% 2% 7% 0.4% 0.0%

45-54 5% 90% 7% 2% 2% 0.0% 0.0%

55-64 4% 68% 22% 4% 7% 0.0% 0.0%

65+ 6% 71% 27% 0% 2% 0.0% 0.0%

5-65+ 6% 69% 19% 1% 5% 0.1% 5.4%

19

Travel Mode of Daily Trips by Age in Outer Suburbs Outside of Activity Centers (2007/2008)

Age

% Live Outside Activity Center

Auto Driver

Auto Passenger Transit Walk Bike Other

5-15 95% 0% 67% 0% 6% 0.4% 26.9%

16-24 93% 60% 27% 0% 3% 0.2% 8.9%

25-34 91% 81% 12% 3% 4% 0.0% 0.5%

35-44 94% 87% 7% 2% 4% 0.2% 0.4%

45-54 95% 84% 9% 3% 3% 0.3% 0.8%

55-64 96% 82% 12% 2% 2% 0.1% 0.6%

65+ 94% 75% 20% 1% 2% 0.0% 1.9%

5-65+ 94% 68% 21% 2% 3% 0.2% 5.7%20

21

Significant Findings

The significant increase in the proportion of single person households in the region had a dramatic impact on the average number of daily trips per household.

Per person daily trip rates decreased moderately for persons from 5 to 34.

Per person daily trip rates increased significantly for persons 65+.

The share of daily trips by auto driver vehicle trips decreased 2.2 percentage points, the walk share increased by 1.6 percentage points, and the transit share increased by 0.7 percentage points.

The biggest modal shifts between auto driver vehicle trips and the transit and walk modes were seen in the 16 to 34 and the 55 to 64 age groups.

Persons 25 to 34 more likely to live in Regional Activity Centers