Interstate 90 in Washington
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Template:Infobox Interstate/Intrastate Within the U.S. state of Washington, Interstate 90 spans 296.92 miles (477.8 km). 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 Martinez Dr. near the roof shed of Safeco Field at an interchange with 4th Avenue S.
I-90 incorporates two of the longest floating bridges in the world, the Lacey V. Murrow Memorial Bridge and the Homer M. Hadley Memorial Bridge, which cross Lake Washington from Seattle to Mercer Island, Washington. They are the second and fifth longest such bridges, respectively.
Sixty miles east of Bellevue I-90 traverses the Cascade Mountain Snoqualmie Pass, elevation 3,022 feet, the lowest east-west highway crossing in Washington state.[1]
Since 1980, I-90 from Seattle to Thorp, WA, was designated the Mountains To Sound Greenway to protect its outstanding scenic and cultural resources.[2]
Washington Law Defining Route
The Washington section of I-90 is defined at Washington Revised Code § 47-17-140.[1]
Route description
Prior to 2003, Interstate 90 used to end at an signalized intersection with 4th Avenue S. However, increasing traffic from Downtown Seattle, Colman Dock, Safeco Field, and Qwest Field forces city, county, and state officials to look for improvements to the area. The first stage of the improvements, the SR 519 South Seattle Intermodal Access Project[2], included the construction of a new on-ramp to Interstate 90 via a new interchange with 4th Avenue S. and Edgar Martinez Drive S. (formerly Atlantic Street). The second stage of improvements has yet to be constructed. From there, Interstate 90 travels east through the Central Area and into tunnels under the Mount Baker neighborhood. The tunnels end at the western shore of Lake Washington and onto floating bridges to Mercer Island and under several lids (tunnels) onto the East Channel Bridge into Bellevue and Issaquah. Between Seattle and Bellevue, there are reversible express lanes in the middle of I-90, operating in the westbound direction during the morning commute and eastbound during the evening commute. I-90 then enters the Cascade Mountain range through Snoqualmie Pass and out towards the Columbia Plateau, where I-90 the crosses the Columbia River on the Vantage Bridge. The freeway then heads slight north to climb the Plateau and head east, passing through Moses Lake. At Ritzville, I-90 forms a concurrency with US 395 towards Spokane, where US 2 also forms a concurrency and both US 395 and US 2 branch off from I-90 and Downtown Spokane. I-90 continues to head east through the suburbs of Spokane and into Idaho.
Exit list
| County [3] | Location | Mile | # | Destinations | Notes |
|---|---|---|---|---|---|
| King | Seattle | 2.03 | Qwest Field, City Center | Westbound exit and eastbound entrance | |
| 2.25 | 2A |   I-5 south – Tacoma, Portland
|
Signed as exit 2B westbound | ||
| 2.40 | 2B |  I-5 north - Vancouver, BC
|
Signed as exit 2C westbound | ||
| 3.03 | 3 | Rainier Avenue | Signed as exits 3A (south) and 3B (north) westbound; no westbound entrance | ||
| Mercer Island | 5.82 | 6 | West Mercer Way | Eastbound exit and westbound entrance | |
| 6.56 | 7A | 77th Avenue Southeast | Eastbound exit and westbound entrance | ||
| 6.85 | 7B | Island Crest Way | Signed as exit 7 westbound | ||
| 8.12 | 8 | East Mercer Way | |||
| Bellevue | 8.88 | 9 | Bellevue Way | ||
| 9.26 | 10A |  I-405 – Bothell, Bellevue, Everett, Renton, Tacoma
|
Signed as exit 10 westbound | ||
| 9.82 | 10B | Richards Road - Factoria | Eastbound exit and westbound entrance | ||
| 10.45 | File:HOV Diamond plate.PNG HOV exit only | 142nd Avenue SE - Eastgate Transit Center | |||
| 10.89 | 11A | 150th Avenue SE, 156th Avenue SE, 161st Avenue SE | Signed as exit 11 westbound | ||
| 11.14 | 11B | 148th Avenue SE - Bellevue College | Eastbound exit and westbound entrance | ||
| 13.30 | 13 | Lakemont Boulevard SE, West Lake Sammamish Parkway SE, SE Newport Way | |||
| Issaquah | 15.06 | 15 |   SR 900 west (17th Avenue Northwest) – Lake Sammamish State Park, Renton
|
||
| 16.85 | 17 | Front Street, East Lake Sammamish Parkway Southeast | |||
| 17.23 | 18 | East Sunset Way, Highlands Drive | |||
| 19.97 | 20 | High Point Way | |||
| Preston | 22.22 | 22 | Preston-Fall City Road (Preston, Fall City) | ||
| Snoqualmie | 25.37 | 25 |  SR 18 west – Auburn, Tacoma
|
||
| North Bend | 27.14 | 27 | Snoqualmie, North Bend | Eastbound exit and westbound entrance | |
| 20.24 | 31 |  SR 202 west – North Bend, Snoqualmie
|
|||
| 32.34 | 32 | 436th Avenue Southeast | |||
| 34.33 | 34 | 468th Avenue Southeast | |||
| 37.46 | 38 | SE Homestead Valley Road - State Patrol, Fire Training Academy | |||
| 41.92 | 42 | Tinkham Road | |||
| 45.25 | 45 | USFS Road 9030 | |||
| Denny Creek, Ashahel Curtis | 47.19 | 47 | Asahel Curtis Road | ||
| Kittitas | 51.67 | 52 | East Summit | ||
| 52.61 | 53 | Yellowstone Road - Snoqualmie Summit Recreation Area | |||
| 54.47 | 54 | Hyak, Gold Creek | |||
| Stampede Pass, Lake Katchess | 62.74 | 62 | Kachess Lake Road | ||
| 63.81 | 63 | Cabin Creek Road | |||
| Easton | 70.00 | 70 | Railroad Street, Sparks Road | ||
| 71.32 | 71 | Cabin Creek Road | |||
| 73.83 | 74 | W Nelson Siding Road | |||
| 77.86 | 78 | Bernardo Road | |||
| Roslyn, Salmon La Sec | 80.06 | 80 | Bullfrog Road | ||
| Cle Elum | 82.75 | 84 | 1st Street W | Westbound exit. | |
| 84.38 | 84 | Oakes Avenue | Eastbound exit. | ||
| 85.65 | 85 |   SR 903/SR 970 - Cle Elum, Wenatchee
|
|||
| 88.76 | N/A | Indian John Hill rest area | |||
| 93.41 | 93 | Elk Heights Road - Taxrum | Signed eastbound only. | ||
| 100.89 | 100 | Thorp Highway - Thorp | |||
| Ellensburg | 105.56 | 106 |  US 97 - Wenatchee
|
||
| 109.50 | 109 | Canyon Road - Ellensburg | |||
| 110.33 | 110 |  Interstate 82/US 97 - Yakima, Tri-Cities
|
|||
| 115.20 | 115 | Kittitas | |||
| 125.52 | N/A | Ryegrass rest area | |||
| 136.16 | 136 | Huntzinger Road - Vantage | |||
| Grant | 137.67 | 137 |  to File:WA-247.svg SR 26 to SR 247 - Othello, Richland
|
Westbound exit. | |
| 138.56 | 137 | SR 26 - Othello, Pullman
|
Eastbound exit. | ||
| 139.56 | 139 | Scenic Viewpoint | |||
| 143.43 | 143 | Silica Road | |||
| 149.46 | 149 |  SR 281 - George, Washington
|
|||
| 151.33 | 151 |    SR 281, SR 283 - Ephrata, Soap Lake
|
|||
| 154.63 | 154 | Adams Road | |||
| 161.12 | N/A | Winchester Wasteway rest area | |||
| 164.52 | 164 | Dodson Road | |||
| 169.37 | 169 | Hiawatha Road | |||
| Moses Lake | 174.61 | 174 | Mae Valley, N Hansen Road | No eastbound on-ramp | |
| 175.40 | 175 | N Westshore Drive, N West Lake Road | Westbound only. | ||
| 175.67 | 176 |  / Interstate 90 Business (Washington)/SR 171 - Moses Lake
|
|||
| 179.25 | 179 |  SR 17 - Othello, Moses Lake, Ephrata
|
|||
| 182.60 | 182 | "O" Road NE/SE - Wheeler | |||
| 184.65 | 184 | "Q" Road NE/SE | |||
| 188.60 | 188 | "U" Road NE/SE - Warden | |||
| Adams | 196.61 | 196 | Deal Road - Schrag | ||
| 197.92 | N/A | Schrag Rest Area | |||
| 206.49 | 206 |  SR 21 - Lind, Odessa
|
|||
| Paha, Packard | 214.96 | 215 | Paha-Packard Road | ||
| 219.81 | 220 | To  US 395 - Ritzville, Pasco
|
|||
| 221.55 | 220 | US 395 - Ritzville, Pasco
|
Eastbound exit only | ||
| 221.59 | 221 |  SR 261 - Ritzville, Wastunca
|
|||
| 226.26 | 226 | Schoessler Road, Coker Road | |||
| 230.97 | 231 | Tokio | |||
| Lincoln | 241.61 | N/A | Sprague Lake Rest Area | ||
| 245.04 | 245 |  SR 23 - Sprague, Harrington
|
|||
| 253.73 | 254 | Fishtrap | |||
| Spokane | 257.42 | 257 |  SR 904 - Tyler, Cheney
|
||
| 264.04 | 264 |  SR 902 - Cheney, Medical Lake
|
|||
| 270.29 | 270 | SR 904 - Four Lakes, Cheney
|
|||
| 272.58 | 272 | SR 902 - Medical Lake
|
|||
| 275.93 | 276 | S Grove Road - East Sprague, Geiger Field
|
|||
| Garden Springs | 277.26 | 277A | Garden Springs Road | Eastbound only. | |
| 277.76 | 277B |  US 2 - Spokane Airport, Fairchild AFB
|
Eastbound only. | ||
| Spokane | 278.25 | 277 | US 2 - Spokane Airport, Davenport
|
Westbound only. | |
| 279.20 | 279 |  US 195 Inland Empire Highway - Colfax, Pullman
|
|||
| 279.79 | 280 | Maple Street, Lincoln Street | Eastbound only. | ||
| 280.72 | 280A | Maple Street - Maple Bridge | Westbound only. | ||
| 280.93 | 280B | Lincoln Street | Westbound only. | ||
| 281.11 | 281 | East North US 2 East/US 395 North - Newport, Colville
|
|||
| 281.71 | 282 |  SR 290 Spur to SR 290 - Trent Avenue, Hamilton Street
|
Eastbound only. | ||
| 282.44 | 282A | SR 290 Spur to SR 290 - Trent Avenue, Hamilton Street
|
Westbound exit. | ||
| 282.59 | 282B | Second Avenue | Westbound only. | ||
| 282.73 | 283A | Altamont Street | |||
| 283.44 | 283B | Freya Street, Thor Street | |||
| 284.02 | 284 | Havana Street | Westbound only. | ||
| 285.11 | 285 | Sprague Avenue | |||
| 285.48 | 286 | Broadway Avenue | |||
| Spokane Valley | 287.45 | 287 | Argonne Avenue - Millwood | ||
| 289.52 | 289 |  SR 27, Pines Road - Opportunity
|
|||
| 290.29 | 291A | Evergreen Road | |||
| 291.45 | 291B | Sullivan Road - Veradale | |||
| 293.61 | 293 | Barker Road - Greenacres | |||
| Liberty Lake | 295.29 | 294 | East Appleway Way, to East Sprague Avenue | Westbound only. | |
| 295.73 | 296 | North Liberty Lake Road, North Harvard Road - Otis Orchards | |||
| 299.20 | 299 | State Line, Idaho |
References
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