Portland, Oregon, has the highest percentage of bicycle commuters among large cities, according to an analysis by the U.S. Census Bureau. About 3.5 percent of Portland's workers pedal to work, about eight times the national average of 0.4 percent.

The large cities with the highest percentage of bicycle commuters are:

1. Portland (3.5 percent)
2. Minneapolis (2.4 percent)
3. Seattle (2.3 percent)
4. Tucson, AZ (2.2 percent)
5. San Francisco (1.8 percent)
6. Sacramento, CA (1.8 percent)
7. Washington, D.C. (1.7 percent)
8. Oakland, CA (1.5 percent)
9. Honolulu (1.4 percent)
9. Denver (1.4 percent)

Among the 50 large cities in the analysis Kansas City, Memphis, Indianapolis, Wichita, Omaha, and San Antonio have the lowest percentage of bicycle commuters. The percentage of bicycle commuters in all of those cities is 0.1 percent or less.

Among large cities, Boston had the highest percentage of employees who walk to work (12.5 percent). Nationally, 2.5 percent of workers walked to work, the fourth most popular mode of transportation.

The large cities with the highest percentage of employees who walk to work are:

1. Boston (12.5 percent)
2. Washington, D.C. (10 percent)
3. San Francisco (9.6 percent)
4. New York (9.4 percent)
5. Philadelphia (8.1 percent)
6. Honolulu (6.9 percent)
6. Seattle (6.9 percent)
8. Minneapolis (5.8 percent)
9. Chicago (5.5 percent)
10. Baltimore (5.4 percent)

The large cities with the lowest percentage of workers who walk to work are Arlington, Texas (0.9 percent); Fort Worth, Texas (1.1 percent); and Oklahoma City (1.4 percent).