Data Post

Database

Urban traffic congestion

Here are the number of hours drivers in the nation's largest urban areas sit in traffic each year.

Related story: D.C. has worst traffic in U.S., study says

Urban area	2010	2009	2005	2000	1982
Washington DC-VA-MD	74	70	83	73	20
Chicago IL-IN	71	70	77	55	18
New York-Newark NY-NJ-CT	54	42	51	35	10
Dallas-Fort Worth-Arlington TX	45	48	51	40	7
Boston MA-NH-RI	47	48	57	44	13
Seattle WA	44	44	51	49	10
Houston TX	57	58	55	45	24
Atlanta GA	43	44	58	52	13
Philadelphia PA-NJ-DE-MD	42	39	42	32	12
San Diego CA	38	37	46	35	8
San Francisco-Oakland CA	50	49	74	60	20
Miami FL	38	39	45	38	10
Los Angeles-Long Beach-Santa Ana CA	64	63	82	76	39
Detroit MI	33	33	41	36	14
Phoenix AZ	35	36	44	34	24

SOURCE: Texas Transportation Institute. GRAPHIC: James Buck - The Washington Post. Published September 27, 2011.