Slide on Old Highway 8
State Route 14 (SR 14) is a 180.66-mile-long (290.74 km) state highway in the U.S. state of Washington. The highway travels east-west on the north side of the Columbia River, opposite Interstate 84 (I-84) to the south in Oregon. SR 14 forms a section of the Lewis and Clark Trail Scenic Byway...
SR 14 was established in 1968 as the successor to US 830, created in 1926 with the original United States Numbered Highways, and Primary State Highway 8 (PSH 8). PSH 8 was added to the state highway system in 1905 as a short road along the Columbia River between Washougal and Lyle and was extended westwards to Vancouver and eastwards to Maryhill by 1913. PSH 8, designated as the Evergreen Highway, was extended east to the Tri-Cities in 1949 and this section was retained during the 1964 state highway renumbering and the decommissioning of US 830.
The first highway that traveled through the Columbia River Gorge was surveyed in 1905 at a cost of $15,000 (equivalent to $393,722 in 2015[28]) by the state of Washington as a wagon road connecting Washougal in Clark County to Lyle in Klickitat County that was designated as secondary State Road 8.[29] State Road 8 was extended east from Lyle to Maryhill and northeast to the county seat of Goldendale in 1907.[30][31] The secondary highway, named the North Bank Highway, was re-aligned in 1913 to follow closer to the Columbia River and was extended west to Vancouver and east to Mabton via Satus Pass.[32][33][34] State Road 8 was co-signed with US 830 after the United States Numbered Highways were approved by the American Association of State Highway Officials (AASHO) on November 11, 1926,[35][36] also creating a short concurrency with US 97.[37][38]
The North Bank Highway was constructed with macadam pavement and was dedicated from Lyle to Dallesport in 1934,[39]
PSH 8 was replaced fully by US 830 during the 1964 state highway renumbering,[46] but US 830 was decommissioned in 1968 before the new state routes were codified.[47][48] SR 14, previously on the route of US 12,[49] was established in 1968 and remains the designation for the Evergreen Highway.[1]
... begins at an interchange with I-5 in Vancouver. The highway travels east as a four lane freeway through Camas and Washougal and intersects I-205. SR 14 continues east as a two-lane highway through Clark, Skamania, Klickitat, and Benton counties before it ends at an interchange with I-82 and U.S. Route 395 (US 395) near Plymouth.
Wikipedia. https://en.wikipedia.org/wiki/Washington_State_Route_14