Interstate 90
Interstate 90 is the longest interstate highway in the United States. It begins in Seattle, Washington at 4th Avenue S. next to Seahawks Stadium and ends in Boston, Massachusetts at Logan International Airport. More miles of Interstate highway are given this designation than any other in the United States.
Number of Miles
3112.82
Major Cities Along the Route
- Seattle, Washington
- Spokane, Washington
- Missoula, Montana
- Billings, Montana
- Rapid City, South Dakota
- Sioux Falls, South Dakota
- Madison, Wisconsin
- Rockford, Illinois
- Chicago, Illinois
- Gary, Indiana
- South Bend, Indiana
- Toledo, Ohio
- Cleveland, Ohio
- Erie, Pennsylvania
- Buffalo, New York
- Rochester, New York
- Syracuse, New York
- Albany, New York
- Springfield, Massachusetts
- Boston, Massachusetts
Intersections with other Interstates
- Interstate 5 in Seattle, Washington
- Interstate 82 in Ellensburg, Washington
- Interstate 15 in Butte, Montana. They stay merged for about 9 miles.
- Interstate 94 in Billings, Montana
- Interstate 25 in Buffalo, Wyoming
- Interstate 29 in Sioux Falls, South Dakota
- Interstate 35 in Albert Lea, Minnesota
- Interstate 94 in Tomah, Wisconsin. They stay joined until Madison, Wisconsin.
- Interstate 39 in Portage, Wisconsin. They stay joined until Rockford, Illinois.
- Interstate 43 in Beloit, Wisconsin
- Interstate 94 in Chicago, Illinois. They stay joined for a few miles.
- Interstate 55 in Chicago, Illinois
- Interstate 65 in Gary, Indiana
- Interstate 94 in Portage, Indiana
- Interstate 80 in Portage, Indiana. They stay merged until Clearview, Ohio.
- Interstate 69 in Fremont, Indiana
- Interstate 75 in Toledo, Ohio
- Interstate 71 in Cleveland, Ohio
- Interstate 77 in Cleveland, Ohio
- Interstate 79 in Erie, Pennsylvania
- The eastern Interstate 86 in Erie, Pennsylvania
- Interstate 81 in Syracuse, New York
- The eastern Interstate 88 in Schenectady, New York
- Interstate 87 in Albany, New York
- Interstate 91 in Springfield, Massachusetts
- Interstate 84 in Sturbridge, Massachusetts
- Interstate 95 in Newton, Massachusetts
- Interstate 93 in Boston, Massachusetts
Spur Routes
- Rapid City, South Dakota - I-190
- Chicago, Illinois - I-190 (provides car transportation to O'Hare International Airport, I-290
- Cleveland, Ohio - I-490
- Buffalo, New York - I-190, I-290, I-990
- Rochester, New York - I-490, I-590
- Spur to Corning, New York - I-390
- Syracuse, New York - I-690
- Utica, New York - I-790
- Schenectady, New York - I-890
- Spur to Marlborough, Massachusetts - I-290
- Spur to Leominster, Massachusetts - I-190
Unusual Hazards
One of the most peculiar and hazardous stretches of Interstate 90 is the section of highway passing through downtown Cleveland, Ohio, known locally as "Dead Man's Curve". Here, the road takes a nearly 90-degree turn. While there are plenty of large signs and flashing lights alerting motorists to these turns, there have still been a large number of accidents due to inattentive motorists.
Notes
I-90 terminated at Interstate 93 in Boston until it was connected through to the Ted Williams Tunnel in January 2003 as part of the Big Dig, extending I-90 to Boston's Logan International Airport, an additional 1.3 miles beyond the 3111.52 miles already paved.
You can't be the longest Interstate without having a few quirks.
(The Following Information was accurate until 1995) In Montana right by the Idaho border, I-90 is not a divided highway for a few stretches.
Until 1999, the speed limit in Montana was "reasonable and prudent"; it is now 75 mph.
Not only is the I-90 section of the NYS Thruway marked backwards, with mile numbers going down as you go east, but there are two metric only signs when you drive westbound. They are around Syracuse, which is nowhere near Canada.
The NYS Thruway administration decided to test metric signage (which I am told included [briefly] an 88 km/h speed limit sign) on the Thruway. Now the legend part: When one of the metric pushes was on, the state representative from that district was deadset against it. The Thruway chose his district (Liverpool, next to the former GE plant) as the test site.
I-990 is the highest number given to an Interstate.
To add to the quirks about the longest interstate, it also has the most miles twinned with another interstate (I-80 in Ohio and Indiana, I-94 in Illinois and Wisconsin) in the most states 4 (Ohio, Indiana, Illinois, and Wisconsin.) It also intersect the same interstate six times [(I-94) near Michigan City IN, Chicago (southside), Chicago (northside), Madison WI, Tomah WI, and Billings MT.]
It has been said that technically I-90 is not a complete "Interstate" as the Chicago Skyway did not meet the current interstate standards, making I-80 the longest "true/no interupted" interstate without any gaps between the endpoints.
Referenced By
1000km | 1 E6 m | 1e6 m | 1e6 metres | Adams County, Washington | Big Dig | Dwight D. Eisenhower System of Interstate and Defense Highways | Ellensburg, Washington | Golden State Freeway | Grant County, Washington | I-25 | I-75 | I-80 | I-95 | Idaho | Interstate | Interstate 15 | Interstate 25 | Interstate 280 | Interstate 29 | Interstate 35 | Interstate 39 | Interstate 43 | Interstate 5 | Interstate 55 | Interstate 635 | Interstate 65 | Interstate 69 | Interstate 71 | Interstate 75 | Interstate 77 | Interstate 79 | Interstate 80 | Interstate 81 | Interstate 82 | Interstate 84 | Interstate 86 | Interstate 87 | Interstate 88 | Interstate 91 | Interstate 94 | Interstate 95 | Interstate Highway | Interstate List | Interstate highways | Junipero Serra Freeway | King County, Washington | Kittitas County, Washington | Lake Washington | Lincoln County, Washington | List of Interstates | Mass Pike | Massachusetts Turnpike | Montana | New York State Highway 17 | Ninety | One hundred ninety | Santa Ana Freeway | Seattle | Seattle, WA | Seattle, Washington | Sioux Falls | Sioux Falls, South Dakota | Snoqualmie Pass | Spokane County, Washington | U.S. Highway 14 | United States Highway 14 | Wanapum dam | Washington | Washington (U.S. state) | Washington (US state) | Washington (state) | Washington State | Wyoming
|
