Interstate 90

Route Details
Interstate 90 is the longest interstate highway in the US. It runs for 3,101 miles (4961.6 km) and passes 13 states. That's second to Interstate 95 with 15 states (including Washington D.C.). Interstate 90 starts in Seattle, Washington on Interstate 5 and ends at Boston Logan Airport in Boston, Massachusetts on MA SR-1.

Washington
I-90 Express

Spokane Hwy

Idaho
Idaho Hwy

Montana
North-Star Hwy

Wyoming
North-East Expwy

South Dakota
Black Hills Hwy

Rapid-City Bypass

Dakota Tollway (Toll Road)

Minnesota
Minnesota Fields Hwy

Wisconsin
La Crosse Expwy

Madison Expwy

Illinois
Rockford Expwy

Jane Addams Memorial Tollway (Toll Road)

Kennedy Expwy

Kennedy/Ryan Expwy

Chicago Skyway (Toll Road)

Indiana
Indiana Toll Road (Toll Road)

Ohio
Ohio Turnpike (Toll Road)

Northwest Fwy

Inner Belt Fwy

Pennsylvania
Erie Expwy

New York
New York State Thruway {Western Stretch} (a.k.a. Governor Thomas E. Dewey Thruway) (Toll Road)

New York State Thruway (Buffalo) (a.k.a. Governor Thomas E. Dewey Thruway)

New York State Thruway (Toll Road) (a.k.a. Governor Thomas E. Dewey Thruway)

Rensselaer-Troy Expwy

New York State Thruway {Eastern Stretch} (a.k.a. Governor Thomas E. Dewey Thruway) (Toll Road)

Massachusetts
Massachusetts Turnpike (Mass-Pike) (Toll Road)

Massachusetts Turnpike (Boston Extension)