Washington State Route 523

State Route 523 (SR 523, named 145th Street) is a short Washington state highway located on the city limits of Seattle, Shoreline, and Lake Forest Park in King County.[1] The highway travels 0.20 miles (0.32 km) east to interchange with Interstate 5 (I-5), where the northbound ramps are accessed through nearby 5th Avenue Northeast.[1][5] After the I-5 interchange, the road forms the northern boundary of the Jackson Park Golf Course and later continues to SR 522 at the northern Seattle, southern Shoreline and western Lake Forest Park city limits.[4][6] The SR 523 / I-5 interchange was used by an estimated 28,000 motorists daily based on annual average daily traffic (AADT) data collected by the Washington State Department of Transportation.[8] The Washington State Legislature first established a state-maintained highway on a section of present-day SR 523 in 1937, with the establishment of Secondary State Highway 1J (SSH 1J), which ran from Downtown Seattle to Primary State Highway 1 (PSH 1) in North Seattle, via the current 0.05-mile (0.08 km) long section of SR 523 from I-5 to 5th Avenue Northeast.
145th Street (SR 523) looking westbound toward Interstate 5
SR 99SeattleShorelineSR 522Lake Forest ParkUnited StatesWashingtonState highways in WashingtonInterstateScenicPre-19641964 renumberingFormerSR 524Washington state highwayKing CountyInterstate 5SR 522Secondary State Highway 1JSR 513annual average daily trafficWashington State Department of TransportationWashington State LegislaturePrimary State Highway 11964 highway renumberingMagnuson ParkLynnwoodEverettBellinghamBothellMonroeThomas GuideNAVTEQRand McNallyGoogle MapsWashington State Department of Archaeology and Historic PreservationOlympia, WashingtonWashington State Highway CommissionDepartment of HighwaysSR 500SR 501SR 502SR 503SR 504SR 505SR 506SR 507SR 508SR 509SR 510SR 512SR 515SR 516SR 518SR 519SR 520SR 524Edmonds SpurLynnwood SpurSR 525SR 526SR 527SR 528SR 529SR 530SR 531SR 532SR 534SR 536SR 538SR 539SR 542SR 543SR 544SR 546SR 547SR 548SR 599SR 514SR 537SR 540