CONGESTION AND TRAVEL RATES COMPARED - URBAN AREAS

DATA FROM TEXAS TRANSPORTATION INSTITUTE

TRI = TRAVEL RATE INDEX, THE AMOUNT OF ADDITIONAL TIME TO MAKE A TRIP DUE TO CONGESTION

RCI = ROADWAY CONGESTION INDEX, THE RATIO OF DAILY TRAFFIC VOLUME TO SUPPLY OF ROADWAY

PORTLAND VANCOUVER

SAN DIEGO

SEATTLE TACOMA

LOS ANGELES

1999

POPULATION

1,490,000

2,700,000

1,950,000

12,600,000

TRI RANK

8

9

3

1

TRI INDEX

1.36

1.4

1.44

1.55

RCI RANK

9

8

5

1

RCI INDEX

1.24

1.25

1.3

1.58

1986

POPULATION

1,155,000

2,000,000

1,565,000

10,710,000

TRI RANK

29

14

7

1

TRI INDEX

1.1

1.16

1.25

1.4

RCI RANK

19

10

3

1

RCI INDEX

.94

1.04

1.22

1.37

1986 TO 1999 INCREASE IN

TRI INDEX

23.6%

20.6%

15.2%

10.7%

RCI INDEX

31.9%

20.0%

6.5%

15.0%

1999 POPULATION COMPARED TO PORTLAND

180%

130%

846%