This Memorial Day weekend, AAA estimates that 36.1 million Americans will travel 50 miles or more from their homes.

The good news is that rising supplies should make for lower gas prices this weekend: AAA expects Memorial holiday prices to be similar or lower than last year's average, at $3.63 per gallon. The bad news is there are going to be many cars on the road.

Google Maps shared some of its traffic data for the past two months with Mashable, revealing the worst freeways in the United States.

The top ten were:

Interstate H-1 E, Kalihi-Palama in Honolulu, Hawaii Interstate 5 N, in San Diego, California California 2 E, in Los Angeles, California Lunalilo Freeway, Kalihi-Palama in Honolulu, Hawaii U.S. Highway 101, in Hollywood, California Interstate 278 W, in Sunnyside, New York Interstate 678 N, in Briarwood, New York Lunalilo Freeway, from Liliha to Kapalama in Honolulu, Hawaii US Highway 101 N, in downtown Los Angeles, California California 2 E, in Santa Monica and Glendale, California

Google Maps also tracked the worst traffic within metropolitan areas. Atlanta and Los Angeles have a reputation for bad traffic, but according to Google, they're not the worst. That dubious honor goes to Honolulu, Hawaii. Chicago and New York ranked second and third, respectively.

Traffic backs up on U.S. highway 101 before the start of the Memorial Day weekend in Mill Valley, Calif. in 2011. Image: Eric Risberg/Associated Press

Los Angeles came in at number four, followed by Boston, Philadelphia, Pittsburgh, Washington, D.C., San Francisco and Duluth, Minnesota.

Google Maps used U.S. Census Bureau definitions to determine the metropolitan areas, defining each as "a geographical region with a relatively high population density at its core and close economic ties throughout the area." That produced somewhat different results than those found with strict city boundaries, which are usually used for worst-traffic rankings. Google Maps used the Census Bureau method, as opposed to strict city boundaries, in order to incorporate common commuter traffic.

Will you be hitting the road this Memorial Day? Tell us in the comments.