 US 730 was subsequently extended west in 1962 to an intersection with US 30 at Boardman Junction, and was moved further south to an interchange with I-80N in 1967. During the westward extension of US 12 from Idaho into Washington, ODOT suggested to the AASHO a route that included the entirety of US 730 in 1962, while WSDOT suggested routing US 12 over US 410 and Washington State Route 12 (SR 12) to Vancouver, Washington. The AASHO approved the extension of US 12 into Washington on June 20, 1967, routing it along US 410 and SR 14 to its present terminus in Aberdeen. US 395 was re-aligned to a concurrency with I-82 in 1985, crossing the Columbia River on the Umatilla Bridge and having a shorter concurrency with US 730. The old route of US 395 from Cold Springs Junction to Pendleton, part of Pendleton-Cold Springs Highway No. 36, became Oregon Route 37.
