# 1964 state highway renumbering (Washington)

The 1964 state highway renumbering was a reorganization of state highways in the U.S. state of Washington. The new system, based on sign routes (SR, later changed to state routes), replaced the primary and secondary highway system implemented in 1937. It was first signed in January 1964 and codified into the Revised Code of Washington in 1970.

## History

The former numbering system of primary and secondary state highways, using lettered suffixes and unnamed branches, created confusion for motorists as the system expanded. The system also ignored, or conflicted with, the federal highway system and the then-developing Interstate Highway System. The state highway department originally planned for a major highway renumbering in 1957, expanding on the existing primary and secondary system with numbers as high as 59, but serious consideration of a full-scale renumbering began in 1962. It had the specific goal of replacing letter suffixes with two- and three-digit numbers, which would not repeat or conflict with each other or with federal route numbers.
In 1963, the Washington State Legislature passed a law authorizing the creation of a new state highway numbering system under the direction of the Washington State Highway Commission. The law came in response to confusion experienced by tourists visiting during the 1962 World's Fair, held in Seattle. The highway commission approved its numbering plan on June 19, 1963, using even numbers for east–west routes and odd numbers for north–south routes; primary routes would have lower numbers, while secondary routes would use the first digit to indicate its parent route. Federal highways, including Interstate highways, would retain their designations and be incorporated into the system. The new numbering system took effect on January 15, 1964, and new signs were posted at a cost of $115,000.

## Route renumbering
### New Sign Route numbers

| New number | Section | Old number | Notes |
| SR 2 | I-5 in Everett to US 97 in Peshastin | PSH 15 | |
| SR 2 | US 97 in Peshastin to I-90 in Spokane | PSH 2 | |
| SR 2 | I-90 in Spokane to US 395 in Mead | PSH 3 | |
| SR 2 | US 395 in Mead to Idaho state line | PSH 6 | |
| SR 3 | US 101 in Shelton to SR 106 in Belfair | SSH 14A | |
| SR 3 | SR 106 in Belfair to SR 104 at the Hood Canal Bridge | PSH 21 | |
| SR 5 | entire route | PSH 1 | |
| SR 6 | entire route | PSH 12 | |
| SR 7 | entire route | PSH 5 | |
| SR 8 | entire route | PSH 9 | |
| SR 9 | entire route | SSH 1A | |
| SR 10 | US 99 in Seattle to US 97 in Teanaway | PSH 2 | U.S. Route 10 was truncated to Coeur d'Alene, Idaho, in 1971. SR 10 from Cle Elum to Ellensburg still remains as a state highway. SR 90 (I-90) was also renumbered from the same Primary State Highways (see below). |
| SR 10 | US 97 in Teanaway to I-82 in Ellensburg | PSH 3 | U.S. Route 10 was truncated to Coeur d'Alene, Idaho, in 1971. SR 10 from Cle Elum to Ellensburg still remains as a state highway. SR 90 (I-90) was also renumbered from the same Primary State Highways (see below). |
| SR 10 | I-82 in Ellensburg to SR 281 in Burke | PSH 7 | U.S. Route 10 was truncated to Coeur d'Alene, Idaho, in 1971. SR 10 from Cle Elum to Ellensburg still remains as a state highway. SR 90 (I-90) was also renumbered from the same Primary State Highways (see below). |
| SR 10 | SR 281 in Burke to US 395 in Ritzville | PSH 18 | U.S. Route 10 was truncated to Coeur d'Alene, Idaho, in 1971. SR 10 from Cle Elum to Ellensburg still remains as a state highway. SR 90 (I-90) was also renumbered from the same Primary State Highways (see below). |
| SR 10 | US 395 in Ritzville to US 2 in Spokane | PSH 11 | U.S. Route 10 was truncated to Coeur d'Alene, Idaho, in 1971. SR 10 from Cle Elum to Ellensburg still remains as a state highway. SR 90 (I-90) was also renumbered from the same Primary State Highways (see below). |
| SR 10 | US 2 in Spokane to Idaho state line | PSH 2 | U.S. Route 10 was truncated to Coeur d'Alene, Idaho, in 1971. SR 10 from Cle Elum to Ellensburg still remains as a state highway. SR 90 (I-90) was also renumbered from the same Primary State Highways (see below). |
| SR 11 | entire route | PSH 1 | |
| SR 12 | entire route | PSH 8 | In 1967, U.S. Route 12 was extended into Washington. At that time, SR 14 was renumbered as a portion of US/SR 12, and SR 12 was renumbered as a portion of current SR 14. |
| SR 14 | entire route | PSH 5 | In 1967, U.S. Route 12 was extended into Washington. At that time, SR 14 was renumbered as a portion of US/SR 12, and SR 12 was renumbered as a portion of current SR 14. |
| SR 16 | entire route | PSH 14 | |
| SR 17 | US 395 in Eltopia to SR 28 in Soap Lake | SSH 11G | |
| SR 17 | SR 28 in Soap Lake to US 2 in Coulee City | PSH 7 | |
| SR 17 | US 2 in Coulee City to US 97 near Brewster | PSH 10 | |
| SR 18 | entire route | PSH 2 | |
| SR 20 | entire route | PSH 16 | Extended in 1973 |
| SR 21 | US 395 near Lind to US 2 in Wilbur | SSH 4B | |
| SR 21 | US 2 in Wilbur to SR 30 in Republic | PSH 4 | |
| SR 21 | SR 30 in Republic to Canadian border | SSH 4A | |
| SR 22 | US 410 in Buena to US 97 in Toppenish | PSH 8 | |
| SR 22 | US 97 in Toppenish to US 410 in Prosser | SSH 3A | |
| SR 23 | US 195 in Steptoe to I-90 in Sprague | PSH 18 | |
| SR 23 | I-90 in Sprague to SR 28 in Harrington | SSH 11F | |
| SR 24 | entire route | SSH 11A | |
| SR 25 | entire route | PSH 22 | |
| SR 26 | I-90 in Vantage to SR 261 in Washtucna | SSH 7C | |
| SR 26 | SR 261 in Washtucna to US 295 in Dusty | SSH 11B | |
| SR 27 | US 195 in Pullman to SR 271 in Oakesdale | PSH 3 | |
| SR 27 | SR 271 in Oakesdale to I-90 in Opportunity | SSH 3H | |
| SR 28 | US 2 in East Wenatchee to SR 281 in Quincy | PSH 10 | |
| SR 28 | SR 281 in Quincy to US 2 in Davenport | PSH 7 | |
| SR 30 | US 97 in Tonasket to SR 21 in Republic | PSH 4 | Renumbered in 1973 as a portion of SR 20 |
| SR 30 | SR 21 near Republic to US 395 near Kettle Falls | SSH 3P | Renumbered in 1973 as a portion of SR 20 |
| SR 31 | entire route | PSH 6 | SR 31 was truncated to Tiger in 1973. The portion south of Tiger was renumbered as a portion of SR 20. |
| SR 82 | entire route | PSH 3 | |
| SR 90 | I-5 in Seattle to US 97 in Teanaway | PSH 2 | Interstate 90 was still under construction in 1964. While it was under construction, the Primary State Highway numbers listed referred to both the old alignment (US 10), and the new alignment (I-90). |
| SR 90 | US 97 in Teanaway to I-82 in Ellensburg | PSH 3 | Interstate 90 was still under construction in 1964. While it was under construction, the Primary State Highway numbers listed referred to both the old alignment (US 10), and the new alignment (I-90). |
| SR 90 | I-82 in Ellensburg to SR 281 in George | PSH 7 | Interstate 90 was still under construction in 1964. While it was under construction, the Primary State Highway numbers listed referred to both the old alignment (US 10), and the new alignment (I-90). |
| SR 90 | SR 281 in George to US 395 in Ritzville | PSH 18 | Interstate 90 was still under construction in 1964. While it was under construction, the Primary State Highway numbers listed referred to both the old alignment (US 10), and the new alignment (I-90). |
| SR 90 | US 395 in Ritzville to US 2 in Spokane | PSH 11 | Interstate 90 was still under construction in 1964. While it was under construction, the Primary State Highway numbers listed referred to both the old alignment (US 10), and the new alignment (I-90). |
| SR 90 | US 2 in Spokane to Idaho state line | PSH 2 | Interstate 90 was still under construction in 1964. While it was under construction, the Primary State Highway numbers listed referred to both the old alignment (US 10), and the new alignment (I-90). |
| SR 92 | entire route | SSH 15A | |
| SR 95 | entire route | PSH 3 | In the mid-1970s, US 95 was rerouted to no longer serve the state of Washington. The segment in Washington was renumbered as US 195 Spur and a portion of U.S. Route 195. |
| SR 97 | Oregon state line to SR 22 in Toppenish | PSH 8 | Concurrencies with SR 90 and SR 2 are skipped in this list. |
| SR 97 | SR 22 in Toppenish to I-82 in Union Gap | SSH 3A | Concurrencies with SR 90 and SR 2 are skipped in this list. |
| SR 97 | I-82 in Union Gap to I-90 in Ellensburg | PSH 3 | Concurrencies with SR 90 and SR 2 are skipped in this list. |
| SR 97 | I-90 in Teanaway to US 2 in Peshastin | PSH 2 | Concurrencies with SR 90 and SR 2 are skipped in this list. |
| SR 97 | US 2 in Wenatchee to British Columbia, Canada border | PSH 10 | Concurrencies with SR 90 and SR 2 are skipped in this list. |
| SR 99 | entire route | PSH 1 | US 99 was deleted in 1969. A portion of SR 99 remains as a state highway from Fife to Everett. |
| SR 99 Alt | entire route | SSH 1B | Renumbered SR 539 in 1969 |
| SR 99 Temp | entire route | PSH 1 | This was a temporary state highway designation for West Marginal Way while the West Marginal Way Freeway was under construction in the 1960s. The West Marginal Way Freeway is now a portion of SR 99. West Marginal Way is no longer a state highway. |
| SR 101 | Oregon state line to SR 6 in Raymond | PSH 12 | |
| SR 101 | SR 6 in Raymond to US 410 in Aberdeen | PSH 13 | |
| SR 101 | US 410 in Aberdeen to I-5 in Tumwater | PSH 9 | |
| SR 103 | entire route | SSH 12A | |
| SR 104 | US 101 in Discovery Bay to SR 3 at the Hood Canal Bridge | SSH 9E | |
| SR 104 | SR 3 at the Hood Canal Bridge to the Kingston ferry | PSH 21 | |
| SR 104 | Edmonds ferry to I-5 at the King-Snohomish county line | SSH 1W | |
| SR 104 | I-5 at the King-Snohomish county line to SR 522 in Lake Forest Park | SSH 2B | |
| SR 105 | entire route | SSH 13A | |
| SR 106 | entire route | PSH 21 | |
| SR 107 | entire route | PSH 9 | |
| SR 108 | entire route | SSH 9D | |
| SR 109 | entire route | SSH 9C | |
| SR 111 | entire route | SSH 9G | Removed from state highway system in 1971 |
| SR 112 | entire route | SSH 9A | |
| SR 113 | US 101 in Discovery Bay to the Port Townsend ferry | PSH 9 | SR 113 was renumbered as a portion of SR 20 in 1973. An unrelated road was designated SR 113 in 1992. |
| SR 113 | Keystone ferry to SR 525 on Whidbey Island | SSH 1D | SR 113 was renumbered as a portion of SR 20 in 1973. An unrelated road was designated SR 113 in 1992. |
| SR 120 | entire route | SSH 8B | SR 120 was renumbered as SR 140 in 1967, and was removed from state highway system in 1992 |
| SR 121 | entire route | SSH 8D | SR 121 was renumbered as SR 141 in 1967. SR 801 was renumbered as a new SR 121 at the same time. |
| SR 122 | entire route | SSH 8E | SR 122 was renumbered as SR 142 in 1967. An unrelated road was designated SR 122 in 1992. |
| SR 124 | US 395 in Burbank to SR 125 near Prescott | SSH 3D | |
| SR 124 | SR 125 near Presoctt to US 410 in Waitsburg | SSH 3E | |
| SR 125 | Oregon state line to US 410 in Walla Walla | PSH 3 | |
| SR 125 | US 410 in Walla Walla to SR 124 near Prescott | SSH 3E | |
| SR 126 | entire route | SSH 3L | Removed from state highway system in 1992 |
| SR 128 | entire route | SSH 3K | |
| SR 129 | entire route | PSH 3 | |
| SR 131 | entire route | SSH 2I | SR 131 was renumbered in 1975 as a portion of US 97. An unrelated road was designated SR 131 in 1992. |
| SR 141 | entire route | SSH 5L | SR 141 was dropped from the state highway system in 1967, and the designation was reapplied to former SR 121. |
| SR 143 | entire route | PSH 5 | SR 143 was renumbered as SR 123 in 1967. An unrelated road was designated SR 143 from 1973 to 1985. |
| SR 150 | entire route | SSH 10C | |
| SR 151 | entire route | SSH 10D | The SR 151 designation was deleted in 1987, the roadway having become a portion of US 97 and an eastern extension of SR 150. |
| SR 153 | entire route | PSH 16 | |
| SR 155 | US 2 in Coulee City to the Grand Coulee Dam | SSH 2F | |
| SR 155 | Grand Coulee Dam to US 97 in Omak | SSH 10A | |
| SR 160 | entire route | PSH 14 | |
| SR 161 | Eatonville to SR 512 in South Hill | SSH 5N | |
| SR 161 | SR 512 in South Hill to US 410 in Puyallup | SSH 5G | |
| SR 161 | US 410 in Puyallup to I-5 near Auburn | SSH 5D | |
| SR 162 | entire route | SSH 5E | |
| SR 163 | entire route | PSH 5 | SR 163 was renumbered as a portion of SR 167 in 1969. An unrelated road was designated SR 163 in 1992. |
| SR 165 | entire route | PSH 5 | |
| SR 167 | entire route | PSH 5 | |
| SR 168 | entire route | PSH 5 | The Naches Pass Highway has been part of the state highway system since 1943, and was numbered SR 168 in 1964, but has yet to be constructed. |
| SR 169 | entire route | PSH 5 | |
| SR 171 | entire route | SSH 7E | |
| SR 172 | entire route | SSH 10B | |
| SR 173 | entire route | PSH 10 | |
| SR 174 | SR 17 in Leahy to SR 155 in Grand Coulee | SSH 10B | |
| SR 174 | SR 155 in Grand Coulee to SR 21 near Wilbur | SSH 4C | |
| SR 181 | SR 18 in Auburn to US 99 in Duwamish | SSH 2M | |
| SR 181 | US 99 in Duwamish to SR 900 in South Seattle | PSH 1 | |
| SR 195 | entire route | PSH 3 | |
| SR 202 | entire route | PSH 15 | In 1970, SR 202 was renumbered as a portion of SR 522. SR 522 from Woodinville to North Bend was renumbered as the new SR 202. |
| SR 203 | entire route | SSH 15B | |
| SR 204 | entire route | SSH 15A | |
| SR 205 | entire route | PSH 1 | |
| SR 207 | US 2 near Winton to SR 209 at Lake Wenatchee State Park | SSH 15C | The portion of SR 207 north of Lake Wenatchee was dropped from the state highway system in 1992. |
| SR 207 | SR 209 at Lake Wenatchee State Park to Telma | SSH 15D | The portion of SR 207 north of Lake Wenatchee was dropped from the state highway system in 1992. |
| SR 209 | entire route | SSH 15C | Removed from state highway system in 1992 |
| SR 220 | entire route | SSH 3B | Dropped from the state highway system in 1992 |
| SR 221 | entire route | PSH 8 | |
| SR 223 | entire route | SSH 3T | |
| SR 224 | entire route | SSH 3R | |
| SR 230 | entire route | PSH 18 | |
| SR 231 | I-90 in Sprague to US 2 in Reardan | SSH 2G | |
| SR 231 | US 2 in Reardan to US 395 in Chewelah | SSH 3J | |
| SR 240 | SR 24 in Cold Creek to SR 224 in Richland | SSH 11C | |
| SR 240 | SR 224 in Richland to US 410 in Richland | SSH 3R | |
| SR 243 | entire route | SSH 7C | |
| SR 251 | entire route | SSH 22A | Removed from the state highway system in 1983 |
| SR 260 | SR 17 near Mesa to US 395 in Connell | SSH 11A | |
| SR 260 | US 395 in Connell to SR 26 in Washtucna | SSH 11B | |
| SR 261 | US 410 in Delaney to SR 26 near Washtucna | SSH 11B | |
| SR 261 | SR 26 near Washtucna to I-90 in Ritzville | SSH 11E | |
| SR 270 | entire route | PSH 3 | |
| SR 271 | entire route | PSH 3 | |
| SR 272 | US 195 in Colfax to SR 27 in Palouse | SSH 3F | |
| SR 272 | SR 27 in Palouse to Idaho state line | PSH 3 | |
| SR 274 | entire route | SSH 3H | |
| SR 281 | entire route | PSH 7 | |
| SR 281 Spur | entire route | PSH 18 | |
| SR 282 | entire route | SSH 11G | |
| SR 283 | entire route | PSH 7 | |
| SR 290 | entire route | SSH 2H | |
| SR 291 | entire route | SSH 3S | |
| SR 292 | entire route | SSH 3J | |
| SR 294 | entire route | SSH 6A | Renumbered in 1970 as a portion of SR 20 |
| SR 295 | entire route | PSH 3 | In 1970, US 295 was dropped from the U.S. Highway System, and was renumbered SR 127. In 1979, the section from Dusty to Colfax was renumbered from SR 127 to a portion of SR 26. |
| SR 300 | entire route | SSH 21C | |
| SR 302 | entire route | SSH 14A | |
| SR 303 | SR 304 in Bremerton to Keyport | SSH 21B | |
| SR 303 | Keyport to SR 3 | PSH 21 | |
| SR 304 | entire route | PSH 21 | |
| SR 305 | entire route | SSH 21A | |
| SR 306 | entire route | SSH 21B | Removed from the state highway system in 1992 |
| SR 311 | entire route | SSH 6B | |
| SR 395 | Oregon state line to US 410 in Pasco | PSH 3 | Concurrencies with SR 90 and SR 2 are skipped in this list. |
| SR 395 | US 410 in Pasco to I-90 in Ritzville | PSH 11 | Concurrencies with SR 90 and SR 2 are skipped in this list. |
| SR 395 | US 2 in Mead to British Columbia, Canada border | PSH 3 | Concurrencies with SR 90 and SR 2 are skipped in this list. |
| SR 401 | entire route | SSH 12B | |
| SR 402 | entire route | SSH 12G | The proposed SSH 12-G / SR 402 highway from Grays River to Pe Ell was never built, and was dropped from the state highway system in 1971. |
| SR 403 | entire route | SSH 12C | Removed from the state highway system in 1992 |
| SR 405 | entire route | PSH 1 | I-405 was signed as a state highway until it was improved to Interstate Highway standards in 1970-71. |
| SR 407 | entire route | SSH 12D | Dropped from the state highway system in 1992 |
| SR 409 | entire route | SSH 12F | |
| US 410 | US 101 in Aberdeen to US 101 at Mud Bay | PSH 9 | In 1967, US 410 was dropped from the U.S. Highway System, and became US 12, except from Elma to Naches. From Elma to Mud Bay, SR 410 was renumbered SR 8. From Mud Bay to Tacoma, the designation was removed from concurrencies with US 101 and I-5/US 99 (this section is skipped in this list). From Tacoma to Naches, the highway remained numbered SR 410. In 1973, the section of SR 410 from Tacoma to Sumner was renumbered as a portion of SR 167. |
| US 410 | I-5 in Tacoma to I-82 in Yakima | PSH 5 | In 1967, US 410 was dropped from the U.S. Highway System, and became US 12, except from Elma to Naches. From Elma to Mud Bay, SR 410 was renumbered SR 8. From Mud Bay to Tacoma, the designation was removed from concurrencies with US 101 and I-5/US 99 (this section is skipped in this list). From Tacoma to Naches, the highway remained numbered SR 410. In 1973, the section of SR 410 from Tacoma to Sumner was renumbered as a portion of SR 167. |
| US 410 | I-82 in Union Gap to Idaho state line | PSH 3 | In 1967, US 410 was dropped from the U.S. Highway System, and became US 12, except from Elma to Naches. From Elma to Mud Bay, SR 410 was renumbered SR 8. From Mud Bay to Tacoma, the designation was removed from concurrencies with US 101 and I-5/US 99 (this section is skipped in this list). From Tacoma to Naches, the highway remained numbered SR 410. In 1973, the section of SR 410 from Tacoma to Sumner was renumbered as a portion of SR 167. |
| SR 411 | entire route | SSH 12H | |
| SR 500 | entire route | SSH 8A | |
| SR 501 | entire route | SSH 1T | |
| SR 502 | entire route | SSH 1S | |
| SR 503 | SR 500 in Orchards to SR 502 in Battle Ground | SSH 1U | |
| SR 503 | SR 502 in Battleground to I-5 in Woodland | SSH 1S | |
| SR 504 | entire route | SSH 1R | |
| SR 505 | entire route | SSH 1Q | |
| SR 506 | entire route | SSH 1P | |
| SR 507 | I-5 in Centralia to Tenino | SSH 1N | |
| SR 507 | Tenino to SR 7 in Roy | SSH 5H | |
| SR 508 | entire route | SSH 5K | |
| SR 509 | I-5 in Tacoma to SR 516 in Des Moines | SSH 1V | |
| SR 509 | SR 516 in Des Moines to US 99 at the Duwamish River | SSH 1K | |
| SR 510 | entire route | SSH 5I | |
| SR 512 | entire route | SSH 5G | |
| SR 513 | entire route | SSH 1J | The portion of SR 513 south of SR 520 was dropped from the state highway system in 1971. The portion north of NE 65th Street in Seattle was dropped in 1992. |
| SR 514 | entire route | SSH 1X | Dropped from the state highway system in 1992 |
| SR 515 | entire route | SSH 5C | |
| SR 516 | SR 509 in Des Moines to I-5 in Midway | SSH 1K | |
| SR 516 | I-5 in Midway to SR 169 in Summit | SSH 5A | |
| SR 518 | entire route | SSH 1L | |
| SR 520 | entire route | PSH 1 | |
| SR 522 | entire route | PSH 2 | In 1970, SR 522 east of Bothell was renumbered as SR 202, and old SR 202 from Bothell to Monroe became a portion of SR 522. |
| SR 524 | entire route | SSH 1W | |
| SR 525 | US 99 in Martha Lake to Mukilteo ferry | SSH 1I | |
| SR 525 | Clinton ferry to SR 536 near Anacortes | SSH 1D | |
| SR 526 | entire route | SSH 1I | |
| SR 527 | entire route | SSH 2J | |
| SR 528 | entire route | PSH 1 | |
| SR 530 | entire route | SSH 1E | |
| SR 532 | entire route | SSH 1Y | |
| SR 534 | entire route | SSH 1H | |
| SR 536 | entire route | PSH 1 | In 1973, the portion of SR 536 west of its current western terminus in Fredonia was renumbered as a portion of SR 20. |
| SR 537 | entire route | SSH 1C | In 1975, SR 537 was renumbered SR 237. In 1992, it was dropped from the state highway system. |
| SR 538 | entire route | SSH 1G | |
| SR 540 | entire route | SSH 1Z | Dropped from the state highway system in 1992. |
| SR 542 | entire route | PSH 1 | |
| SR 543 | entire route | PSH 1 | |
| SR 544 | entire route | SSH 1A | |
| SR 546 | entire route | SSH 1B | |
| SR 603 | entire route | SSH 12E | In 1992, SR 603 north of Winlock was dropped from the state highway system. SR 603 south of Winlock was renumbered as a portion of SR 505. |
| SR 702 | entire route | SSH 5J | |
| SR 706 | entire route | PSH 5 | |
| SR 801 | entire route | SSH 1M | In 1967, SR 801 was renumbered as SR 121. Although SR 121 still exists, the section that had been SR 801 was dropped from the state highway system in 1992. |
| SR 830 | US 101 in Johnsons Landing to I-5 in Kelso | PSH 12 | In 1968, US 830 was dropped from the U.S. Highway system. The portion west of I-5 was renumbered as SR 4; the portion east of I-5 was renumbered as a portion of SR 14. |
| SR 830 | I-5 in Vancouver to US 97 in Maryhill | PSH 8 | In 1968, US 830 was dropped from the U.S. Highway system. The portion west of I-5 was renumbered as SR 4; the portion east of I-5 was renumbered as a portion of SR 14. |
| SR 831 | entire route | PSH 12 | In 1968, SRs 831, 832, and 833 were renumbered SRs 431, 432, and 433 respectively. |
| SR 832 | entire route | PSH 12 | In 1968, SRs 831, 832, and 833 were renumbered SRs 431, 432, and 433 respectively. |
| SR 833 | entire route | PSH 12 | In 1968, SRs 831, 832, and 833 were renumbered SRs 431, 432, and 433 respectively. |
| SR 900 | entire route | PSH 2 | |
| SR 901 | entire route | SSH 2D | In 1971, the portion of SR 901 from Bellevue to downtown Redmond was renumbered as SR 908. In 1992, the remaining portion of SR 901 was dropped from the state highway system. |
| SR 902 | entire route | SSH 11D | |
| SR 903 | entire route | SSH 2E | |
| SR 904 | entire route | SSH 11H | The SR 904 designation was assigned in 1964. However, it remained posted as a section of US 10/395 (and not as SR 904) until I-90 was completed past Cheney in 1966. |
This article is part of the highway renumbering series. :
| Alabama | 1928, 1957 |
| Arkansas | 1926 |
| California | 1964 |
| Colorado | 1953, 1968 |
| Connecticut | 1932, 1963 |
| Florida | 1945 |
| Indiana | 1926 |
| Iowa | 1926, 1969 |
| Louisiana | 1955 |
| Maine | 1933 |
| Massachusetts | 1933 |
| Minnesota | 1934 |
| Missouri | 1926 |
| Montana | 1932 |
| Nebraska | 1926 |
| Nevada | 1976 |
| New Jersey | 1927, 1953 |
| New Mexico | 1988 |
| New York | 1927, 1930 |
| North Carolina | 1934, 1937, 1940, 1961 |
| Ohio | 1923, 1927, 1962 |
| Pennsylvania | 1928, 1961 |
| Puerto Rico | 1953 |
| South Carolina | 1928, 1937 |
| South Dakota | 1927, 1975 |
| Tennessee | 1983 |
| Texas | 1939 |
| Utah | 1962, 1977 |
| Virginia | 1923, 1928, 1933, 1940, 1958 |
| Washington | 1964 |
| Wisconsin | 1926 |
| Wyoming | 1927 |
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