Operations Performance Measurement Program
photos of traffic merging on a multi-level freeway interchange, traffic near a construction zone, variable message sign, train at a crossing, traffic on a river bridge, and a rural highway
21st Century Operations Using 21st Century Technologies

UCR October 2011-December 2011 (FY 2012, Q1)

PDF Version 459KB
PDF files can be viewed with the Acrobat® Reader®.

A Snapshot of Congestion Trends in the U.S. for October 2011 through December 2011.

Congested Hours

Average duration of weekday congestion

-22 minutes
from last year
green downward arrow - general trend is for improving conditions

Oct-Dec 2011: 4:30
Oct-Dec 2010: 4:52

Travel Time Index

Peak period travel times vs. off-peak travel times

-1 point
from last year
green downward arrow - general trend is for improving conditions

Oct-Dec 2011: 1.22
Oct-Dec 2010: 1.23

Planning Time Index

Unreliability (variability) of travel

-3 points
from last year
green downward arrow - general trend is for improving conditions

Oct-Dec 2011: 1.52
Oct-Dec 2010: 1.55

Summary of Nationwide Trends

  • Congested hours improved (22 minutes shorter), the travel time index improved slightly (by 1 point), and the planning time index improved by 3 points. All measures compared the most recent 3 months in 2011 to the same 3 months in 2010.
  • Eight of the 18 cities showed improvements in all three measures.
  • Six of the 18 cities showed worsening conditions in all three measures.
  • Five of the 18 cities had stable or mixed results among the three measures.

Congestion and Reliability Trends for Each UCR City

October 2011 through December 2011 Quarterly Urban Congestion Report Compared to the same Three Months Last Year
City Congested Hours Travel Time Index Planning Time Index % Change in VMT % Usable Data
2011 Change from 2010 2011 Change from 2010 2011 Change from 2010
Atlanta, GA n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a.
Boston, MA 5:37 +0:01 1.32 +2 1.78 +2 -2% 100%
Chicago, IL 7:13 +0:14 1.35 +3 1.77 +8 -2% 77%
Detroit, MI 2:53 -0:14 1.12 0 1.39 -4 0% 100%
Houston, TX 3:46 +0:17 1.26 +2 1.62 +11 0% 83%
Los Angeles, CA 5:53 -1:21 1.29 -5 1.61 -9 0% 100%
Minneapolis-St. Paul, MN 3:43 -1:00 1.18 -5 1.44 -29 +3% 98%
Oklahoma City, OK 1:55 +0:21 1.07 +1 1.21 +3 -2% 100%
Orange County, CA 3:57 -0:48 1.22 -4 1.51 -13 -2% 100%
Philadelphia, PA 5:23 -0:25 1.27 -1 1.67 -5 0% 100%
Phoenix, AZ n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a.
Pittsburgh, PA 6:28 -0:13 1.26 +5 1.59 +13 +1% 100%
Portland, OR n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a.
Providence, RI 3:46 +0:46 1.15 +1 1.45 +7 0% 100%
Riverside – San Bernardino, CA 3:03 -0:32 1.13 -2 1.34 -7 +2% 100%
Sacramento, CA 1:59 -0:32 1.10 -1 1.26 -5 -1% 100%
St. Louis, MO 3:54 +2:07 1.10 +1 1.31 +5 -4% 93%
Salt Lake City, UT 1:33 -2:22 1.04 -2 1.15 -13 +1% 98%
San Antonio, TX n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a.
San Diego, CA 2:38 -0:13 1.14 -1 1.39 -3 -1% 100%
San Francisco, CA 3:36 +0:08 1.18 +1 1.40 0 -3% 100%
Seattle, WA n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a.
Tampa, FL 3:05 +0:40 1.13 0 1.31 0 -2% 100%

Notes:
Green bolded values (with sign) indicate improving conditions; red italics (with + sign) indicate worsening conditions.
"n.a." indicates that data was not available or was of insufficient quality.
Comparison of 2011 to 2010 is for the same three-month period (October - December).

For more information on the UCR, contact Rich Taylor (Rich.Taylor@dot.gov).

Office of Operations