Between McMinnville and Forest Grove, the highway is signed as Oregon Route 47; between Forest Grove and Beaverton it is signed as Oregon Route 8.

provides public transit service over the full length of the section between Forest Grove and Beaverton.

[4] The highway replaced a dirt road maintained by the county that ran on the southern side of the railroad tracks.

[5] In March 1953, Washington County planners decided to have the highway widened to four lanes from Beaverton to Forest Grove.

[5] The city of Beaverton paid $5.8 million in urban renewal funds to build an overpass between Murray and 170th Avenue that removed a railroad crossing in 1983.