UCR July 2011-September 2011 (FY 2011, Q4)
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A Snapshot of Congestion Trends in the U.S. for July 2011 through September 2011.
Congested Hours
Average duration of weekday congestion
+7 minutes
from last year
Jul-Sep 2011: 4:21
Jul-Sep 2010: 4:14
Travel Time Index
Peak period travel times vs. off-peak travel times
-1 point
from last year
Jul-Sep 2011: 1.19
Jul-Sep 2010: 1.20
Planning Time Index
Unreliability (variability) of travel
-5 points
from last year
Jul-Sep 2011: 1.41
Jul-Sep 2010: 1.46
Summary of Nationwide Trends
- Congested hours were slightly worse (7 minutes longer) while the travel time index and planning time index improved slightly. All measures compared the most recent 3 months in 2011 to the same 3 months in 2010.
- Six of the 19 cities showed improvements in all three measures.
- Two of the 19 cities showed worsening conditions in all three measures.
- Eleven of the 19 cities had stable or mixed results among the three measures.
Congestion and Reliability Trends for Each UCR City
| 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 | 5:48 | +0:17 | 1.25 | 0 | 1.63 | 0 | -2% | 100% |
| Chicago, IL | 7:48 | +0:42 | 1.33 | 0 | 1.65 | -4 | +6% | 71% |
| Detroit, MI | 3:00 | 0 | 1.12 | 0 | 1.38 | +3 | +3% | 100% |
| Houston, TX | 2:37 | -0:54 | 1.17 | -8 | 1.28 | -29 | 0% | 83% |
| Minneapolis-St. Paul, MN | 3:49 | -0:25 | 1.19 | +1 | 1.44 | -1 | 0% | 90% |
| Oklahoma City, OK | 2:01 | +0:35 | 1.07 | +2 | 1.20 | +4 | -2% | 100% |
| Orange County, CA | 3:32 | -0:23 | 1.18 | -3 | 1.42 | -5 | -4% | 99% |
| Los Angeles, CA | 5:34 | -1:00 | 1.24 | -3 | 1.48 | -5 | -2% | 99% |
| Philadelphia, PA | 5:29 | -0:36 | 1.21 | -1 | 1.60 | +1 | -3% | 100% |
| Phoenix, AZ | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. |
| Pittsburgh, PA | 6:39 | -0:04 | 1.29 | +10 | 1.67 | +22 | -1% | 100% |
| Portland, OR | 1:54 | +0:04 | 1.25 | 0 | 1.62 | -4 | -3% | 33% |
| Providence, RI | 2:59 | +0:29 | 1.11 | +2 | 1.32 | +4 | -2% | 100% |
| Riverside – San Bernardino, CA | 2:22 | -0:21 | 1.09 | -1 | 1.25 | -2 | 0% | 99% |
| Sacramento, CA | 1:47 | -0:10 | 1.08 | -1 | 1.20 | -3 | -3% | 98% |
| St. Louis, MO | 3:06 | +1:26 | 1.08 | 0 | 1.23 | -1 | -3% | 96% |
| Salt Lake City, UT | 1:11 | +0:03 | 1.04 | 0 | 1.13 | +1 | -7% | 68% |
| San Antonio, TX | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. |
| San Diego, CA | 2:08 | -0:13 | 1.10 | -1 | 1.27 | -5 | -3% | 99% |
| San Francisco, CA | 3:01 | -0:11 | 1.14 | 0 | 1.30 | -2 | -2% | 99% |
| Seattle, WA | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. |
| Tampa, FL | 2:58 | +0:46 | 1.11 | 0 | 1.29 | 0 | -6% | 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 (July - September).
For more information on the UCR, contact Rich Taylor (Rich.Taylor@dot.gov).
