Study: Traffic congestion is down nationwide

-- Bridgeport, Connecticut: 42 hours; 5:30-5:45 p.m. Friday.

-- Washington: 45 hours; 5:45-6 p.m. Thursday.

-- Seattle: 33 hours; 5:30-5:45 p.m. Thursday.

-- Austin, Texas: 30 hours; 5:30-5:45 p.m. Thursday.

-- Boston: 35 hours; 5:30-5:45 p.m. Thursday.

-- Chicago: 36 hours; 5:30-5:45 p.m. Thursday.

Top 10 worst stretches of highway in the nation in 2011 for daily commutes were:

1. Los Angeles: A 13-mile stretch of San Diego Freeway/I-405 North from I-105/Imperial Highway Interchange through the Getty Center Drive Exit, which takes 33 minutes on average with 20 minutes of delay.

2. New York: A 16-mile stretch of the Long Island Expressway/I-495 East from the Maurice Avenue Exit to Minneola Avenue/Willis Avenue Exit -- 39 minutes; 22 minutes of delay.

3. Los Angeles: A 15-mile stretch of the Santa Monica Freeway/I-10 East from CA-1/Lincoln Boulevard Exit to Alameda Street --35 minutes; 20 minutes of delay.

4. New York: An 3-mile stretch of I-678 North (Van Wyck Expressway) from Belt Parkway to Main Street -- 13 minutes; 10 minutes of delay.

5. Los Angeles: A 17.5-mile stretch of I-5 South (Santa Ana/Golden State freeways) from E. Caesar Chavez Avenue to Valley View Avenue exits -- 40 minutes; 22 minutes of delay.

6. New York: A 10-mile stretch of I-278 West (Brooklyn Queens/Gowanus Expressway) from NY-25A/Northern Boulevard to the NY-27/Prospect Expressway exits -- 31 minutes on average, with 18 minutes of delay.

7. Los Angeles: An 8-mile stretch of I-405 South (San Diego Freeway) from Nordhoff Street to Mulholland Drive -- 22 minutes; with 14 minutes of delay.

8. New York: A 6-mile stretch of Van Wyck Expressway from Horace Harding Expressway to Linden Boulevard -- 20 minutes; 13 minutes of delay.

9. Pittsburgh: A 3-mile stretch of Penn Lincoln Parkway/I-376 East from Lydia Street to the US-19 TK RT/PA-51 Exit -- 13 minutes; nine minutes of delay in the morning peak period.

10. San Francisco: An 11-mile stretch of the California Delta Highway from Bailey Road to Somersville Road --16 minutes; 11 minutes of delay.