- Interstate 90
terminus_a=Jct|state=WA|SR|519 in Seattle, WA
junction=Jct|state=WA|I|5 in Seattle, WA
Jct|state=MT|I|15 near Butte, MT
Jct|state=WY|I|25 near Buffalo, WY
Sioux Falls, SD
Jct|state=IL|I|55 in Chicago, IL
Jct|state=IN|I|65 in Gary, IN
Jct|state=OH|I|75 near Toledo, OH
Jct|state=MA|I|95 near Boston, MA
terminus_b=Jct|state=MA|Route|1A in Boston, MA
Interstate 90 (I-90) is the longest interstate highway in the United States at nearly 3,100 miles (5,000 kilometers). It is the northernmost coast-to-coast interstate. Its western terminus is in
Seattle, Washington, at 4th Avenue S. next to Safeco Fieldand Qwest Field, and its eastern terminus is in Boston, Massachusetts, at Route 1A near Logan International Airport. It crosses the Continental Dividejust east of Butte, Montana.
Wisconsin/ Illinoisborder east, the majority of I-90 is tolled, along the following toll roads (several of which predate the Interstate system): the Jane Addams Memorial Tollway, Chicago Skyway, Indiana Toll Road, Ohio Turnpike, New York State Thruway, and the Massachusetts Turnpike, including the Ted Williams Tunnel. It is free through downtown Chicago; Greater Clevelandand the rest of northeastern Ohio; Pennsylvania; and through brief sections near Buffalo, Albany, and Boston.
In 2003, the Seattle terminus was re-engineered to better accommodate traffic from the two nearby sports stadiums. I-90 westbound still ends at its previous location next to
Qwest Field, but eastbound begins about 1/4 mile (0.4 km) south at Edgar MartínezDrive S. near the roof shed of Safeco Fieldat an interchange with 4th Avenue S.
The tunnel that carries Interstate 90 under the Mount Baker Ridge is on the
National Register of Historic Places. The east portal of the tunnel (visible when entering Seattle from the east) is constructed as a "bas relief" concrete sculpture.
I-90 incorporates two of the longest
floating bridges in the world, the Lacey V. Murrow Memorial Bridgeand the Homer M. Hadley Memorial Bridge, which cross Lake Washingtonfrom Seattle to Mercer Island, Washington. They are the second and fifth longest such bridges, respectively.
Forty miles east of Bellevue I-90 traverses the
Cascade Range's Snoqualmie Pass, elevation convert|3022|ft|m. At mile 137, it crosses the Columbia Riveron the Vantage Bridge, and after entering Spokane near mile 279, enters Idaho convert|20|mi|km later.
Since 1980, I-90 from Seattle to
Thorp, WA, was designated the Mountains To Sound Greenwayto protect its outstanding scenic and cultural resources. [cite web | url=http://www.mtsgreenway.org | title= Mountains To Sound Greenway (Washington)]
Washington Law Defining Route
The Washington section of I-90 is defined in the Revised Code of Washington (RCW 47.17.140). [cite web |url=http://apps.leg.wa.gov/RCW/default.aspx?cite=47.17.140 |title=RCW 47.17.140 State route No. 90 — American Veterans Memorial Highway |accessdate=2007-08-29 |publisher=Access Washington -- Official State Government Website ]
The small town of
Wallace, Idahostill prides itself on having what was the last stop light on I-90. Its downtown has many historical buildings, which would have been wiped out by the original planned route of the freeway, so in 1976, city leaders had the downtown placed on the National Register of Historic Places. As a result, the federal government was forced at great expense to reroute the freeway to the northern edge of downtown and elevate it. That section of I-90 opened in September 1991. A bicycle path is routed beneath part of that segment.
1995in Montananear the Idaho border, I-90 was not a divided highway for a few stretches, having only a narrow paved median. From 1995until 1999, the speed limit in Montana was "reasonable and prudent"; it is now 75 mph (120 km/h). On the I-90, at Exit 00 (right on the MT/ID border) is the Lookout Pass Ski Area, and one exit east of there is the Hiawatha Trail (rails-to-trails).
Montanaborder I-90 is a four-lane divided highway with a grass median. At Buffalo, Wyoming(if travelling eastward from the north) it diverges from I-25 with a more east-west orientation.
The South Dakota section of I-90 is defined at South Dakota Codified Laws § 31-4-184. [cite web |url=http://legis.state.sd.us/statutes/DisplayStatute.aspx?Type=Statute&Statute=31-4-184 |title=South Dakota Codified Laws |accessdate=2007-08-29 |publisher= [http://legis.state.sd.us/index.aspx South Dakota Legislature - Legislative Research Council] ]
Rapid City, South Dakotaat the Wyoming border I-90 is a four lane divided highway with a grass median. In the Sioux Falls area, I-90 intersects I-29 and continues east a short distance to Minnesota. I-90 is the largest east-west thoroughfare in South Dakota.
The Minnesota section of I-90 is defined as Route 391 in Minnesota Statutes § 161.12(3). [cite web |url=http://ros.leg.mn/bin/getpub.php?pubtype=STAT_CHAP_SEC&year=2006§ion=161.12 |title=161.12, Minnesota Statutes 2006 |accessdate=2007-08-29 |year=2006 |publisher= [http://ros.leg.mn/ Minnesota State Legislature, Office of the Revisor of Statutes] ]
I-90 crosses southern Minnesota from the South Dakota border near Sioux Falls to the
Mississippi Rivernear La Crosse, Wisconsin. On most of its length in the state, it is close to the Iowaborder and fairly parallel with it. In southeast Minnesota, it curves north to Rochester.
I-39/90/94 from just south of Portage to Madison is the longest concurrency of three interstate highways in the United States.
In the state of
Illinois, Interstate 90 enters Illinois north of Rockford oriented north-south joined with Interstate 39. It then runs east-southeast directly to the city of Chicago. From Rockford to Interstate 294the road is tolled and called the Northwest Tollway. In 2007, the Illinois State Toll Highway Authority renamed the Northwest Tollway, the Jane AddamsMemorial Tollway. In the Chicago metropolitan area, I-90 is known by three names from O'Hare International Airportto the Indianastate line. The Kennedy Expresswayruns from O'Hare to Interstate 290 and the Chicago Loop. I-90 continues running south of the Loop on part of the Dan Ryan Expressway, and then southeast onto the tolled Chicago Skywayinto Indiana.
In the state of Indiana, Interstate 90 runs over the
Indiana Toll Road. Interstate 90 enters from Illinois at the Chicago Skyway. It then runs to the concurrency of Interstates 80/94 east of Interstate 65, where I-80 leaves I-94 and joins with I-90. The combined I-80/90 route runs east across northern Indiana and near the southern border of Michiganto the Ohio state line.
The Indiana Toll Road turns into the
Ohio Turnpikeas it crosses the border. I-90 follows the Ohio Turnpikeuntil Lorain(west of Cleveland), where it turns north to follow a route near the shores of Lake Erie.
In Cleveland, Interstate 90 serves as the Innerbelt at the confluence of the northern termini of Interstates 71 and 77. One of the most peculiar and hazardous stretches of Interstate 90 is the section of highway passing through downtown, known locally as
Dead Man's Curve. Here, the road takes a nearly 90-degree turn. [cite web |url=http://maps.google.com/maps?q=Cleveland,+OH&t=h&hl=en&ll=41.515872,-81.672256&spn=0.011809,0.029697&om=1 |title=Cleveland, Ohio Google Maps satellite view |accessdate=2007-08-29 ] While there are plenty of large signs, flashing lights, and rumble strips alerting motorists to this turn, there have still been a large number of accidents due to inattentive motorists. There are plans to realign the freeway along a shallower curve within the next decade, as part of a larger project to improve the highway system in Cleveland. [cite web |url=http://www.innerbelt.org/ |title=Cleveland Urban Core Projects |accessdate=2007-08-29 |publisher=Ohio Department of Transportation ]
The Innerbelt in Cleveland also utilizes a steel-gusset bridge of the same design as the I35W bridge that failed in Minneapolis. Beginning September 30, two lanes in each direction of the 8 lane bridge were closed to reduce the weight load on the structure. The bridge is currently under close inspection as it has deteriorated greatly over the last few years. On Wednesday night, October 8 the bridge will be closed entirely to undergo a stress test. Many in the Cleveland area are beginning to question the safety of the bridge, and ODOT continues to stress that the bridge is safe and if there was any immenent danger it would be closed permanently.
I-90 goes from the Ohio state line through
Erie, Pennsylvania, and then leaves Pennsylvania for New York.
While not an interstate, a portion of
Pennsylvania Route 5in Erie has recently been named Pennsylvania Route 290. The purpose is to encourage travelers to use this stretch of Erie's 12th Street as a loop, connecting Interstate 79and 90 to the Bayfront Connector and downtown Erie.
I-90 becomes the
New York State Thruwayupon entering New York. It follows the Lake Eriecoast until Buffalo, where it joins the old Water Level Routeuntil Albany. There, it takes a short detour before joining the New York State ThruwayBerkshire Connector.
Almost all of the
New Yorkportion of the road is a toll road, comprising the east-west portion of the New York State Thruwaymainline and part of the Berkshire Connector, operated by the New York State Thruway Authority. It was originally constructed as part of the Thruway project in the middle 1950sand received its current designation as Interstate 90 in 1958. "I-90" (operated by NYSDOT) carries Interstate 90 between the two; however, the Berkshire Section directly connects to the mainline (at Thruway interchange 21A) 6.5 miles (10.5 km) west of the point where I-90 joins it (at Thruway interchange B1).
mileposts and exit numbers on the New York State Thruwaymainline originate at the New York Cityline and increase northward along Interstate 87and westward along Interstate 90. As a result, mileposts and exit numbers on the I-90 section of the Thruway mainline increase from east to west, contrary to modern practices where numbers increase from the west or south. The NYSDOT-maintained portion in between, known to locals as "Freebie 90," does number its mileage and exits in the traditional west-to-east method. (Ironically, "Freebie 90" is oriented geographically north-south for most of its length, so the exit numbers seem to increase from north to south.) Exit and milepost numbering starts over again when the Berkshire Section of the Thruway begins, with exit and mile numbers preceded by the letter B (Exit B1, Exit B2, Mile B1, Mile B2, and so on).
There once were two metric-only signs on the westbound
New York State Thruwayaround Syracuse, which is about 100 miles (161 km) from Canada. The NYS Thruway Authority decided to test metric signage, which may have briefly included an 88 km/h speed limit sign, on the Thruway. There was also a sign displaying the distance to the Interstate 81interchange in kilometers in Dewitt. These signs are now displayed in just miles.
I-90 is the only Interstate having a complete set of nine
spur routes (190, 290, 390...890, 990) within one state, which is in New York. (Interstate 80 has a complete set in different states.) In addition, I-990, a short spur route near Buffalo, New Yorknot directly connected to I-90, is the highest number given to an Interstate. I-790in Utica used to have a completely direct connection with the I-90 at Thruway interchange 31. Various road redesign projects over the years have eventually led to this direct connection being partially severed. Traffic "exiting" the Thruway must use two different surface streets to reach I-790. However, it is still possible to travel from I-790 directly "onto" the Thruway. I-790 has some other oddities: no exit numbers, no reassurance markers, and it runs concurrent with New York State Route 5for its entire length.
The New York section of I-90 west of the
Berkshire sectionof the New York Thruwayis defined as Interstate Route 504 in New York Highway Law § 340-a. [cite web |url=http://public.leginfo.state.ny.us/LAWSSEAF.cgi?QUERYTYPE=LAWS+&QUERYDATA=$$HAY340-A$$@TXHAY0340-A+&LIST=LAW+&BROWSER=24884763+&TOKEN=38521156+&TARGET=VIEW |accessdate=2007-08-29 |title=(Title Forthcoming)]
I-90 in Massachusetts runs along the pre-Interstate era
Massachusetts Turnpike, which opened on May 15, 1957 from West Stockbridge at the New York state border to Massachusetts Route 128.
The first section of the "Boston Extension" opened in September 1964 from the original terminus at Route 128 to the Allston/Brighton Tolls. The entire Boston Extension opened on February 18, 1965 continuing from the Allston/Brighton Tolls to I-93 in Downtown Boston. The new extension added convert|12|mi|km to the MassPike's original 123.
I-90 was extended again as part of the Big Dig from its terminus at I-93 to Boston's
Logan International Airportand a terminus of Route 1A in January 2003via tunnels under the Fort Point Channel and the Ted Williams Tunnelunder Boston Harbor. This extended I-90 by an additional 1.3 miles (2.1 km), shifting the eastern terminus to Route 1A. Turnpike Doublesare permitted to travel between exit 11 and through the New York state border.
I-90 made heavy use of existingroads. The
Massachusetts Turnpike, New York State Thruway, Ohio Turnpike, Indiana Toll Road, Chicago Skyway, and Northwest Tollwayall predate I-90 and were used for parts of its route. This also means that substantial portions of the route are not precisely to interstate standards, but they are usually close.
Interstate 5in Seattle, Washington
*Interstate 405 in
Interstate 82in Ellensburg, Washington
*Interstate 15 in
Butte, Montana; joined for 7.65 miles (12.31 km)
Interstate 94in Billings, Montana
Interstate 25in Buffalo, Wyoming
Interstate 29in Sioux Falls, South Dakota
Interstate 35in Albert Lea, Minnesota
Interstate 94in Tomah, Wisconsin; joined for 91.76 miles (147.67 km) until Madison, Wisconsin.
Interstate 39in Portage, Wisconsin; joined for about 95 miles (152 km) until Rockford, Illinois.
Interstate 43in Beloit, Wisconsin
Interstate 94in Chicago, Illinois; joined for 16.71 miles (26.89 km)
Interstate 55in Chicago, Illinois
Interstate 65in Gary, Indiana
Interstate 94in Lake Station, Indiana
Interstate 80in Lake Station, Indiana; joined for 278.40 miles (448.04 km) until Lorain, Ohio.
Interstate 69in Fremont, Indiana
Interstate 75in Toledo, Ohio
Interstate 71in Cleveland, Ohio
Interstate 77in Cleveland, Ohio
Interstate 271in Willoughby, Ohio
Interstate 79in Erie, Pennsylvania
*Interstate 86 in
Interstate 81in Syracuse, New York
*Interstate 88 in
Rotterdam, New York
Interstate 87in Albany, New York
Interstate 91in West Springfield, Massachusetts
*Interstate 291 in
*Interstate 84 in
*Interstate 395 in
*Interstate 495 in
*Interstate 95 in
Weston, Massachusetts[ [http://maps.google.com/maps?q=Weston,+MA&ll=42.337103,-71.261959&spn=0.028570,0.045010&hl=en Map] ]
Interstate 93in Boston, Massachusetts[ [http://maps.google.com/maps?q=Boston,+MA&ll=42.343574,-71.065407&spn=0.114266,0.180038&hl=en Map] ]
Rapid City, South Dakota- I-190
*Chicago, Illinois - I-190 (provides a direct route to
O'Hare International Airport), I-290
Cleveland, Ohio- I-490
Buffalo, New York- I-190, I-290, I-990
*Rochester, New York - I-390, I-490, I-590 (not directly connected)
Syracuse, New York- I-690
Utica, New York- I-790
Schenectady, New York- I-890
*Spur to I-495 in
Marlborough, Massachusetts- I-290
Leominster, Massachusetts- I-190
I-90 is the only interstate to have a complete set of auxiliary routes within a single state, that being
* [http://illi-indi.com/il_EndsPage.php?id=3090§ion=1 Illinois Highway Ends: I-90]
* [http://illi-indi.com/EndsPage.php?id=3090§ion=1 Indiana Highway Ends: I-90]
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