When the current state highway numbering system was first posted in January 1964, the highway that was to become SR 432 was numbered SR 832. SR 832 began at Jct US 830 about a mile NW of downtown Longview and headed south then SE on Nichols Blvd to Tennant Way. Continuing on Tennant Way, SR 832 headed east, crossing the Cowlitz River and ending at I-5/US 99 Exit 36. This interchange is sometimes called the Longview "Wye". When US 830 was dropped from the US highway system in 1968, former US 830 west of I-5 was redesignated as SR 4. SR 832 became SR 432. Around 1970, SR 432 was upgraded to 4 lane expressway from an interchange of Tennant Way with 3rd Ave to I-5.
Effective April 1, 1992, the route of SR 432 was changed in the Longview area. The western terminus of SR 432 was moved to a junction with SR 4 about 6 miles west of downtown Longview. From this point, SR 432 now heads south, then ESE via the industrial area along the Columbia River. SR 432 follows Industrial Way to 3rd Ave and then heads north on 3rd to Tennant Way. At the interchange of 3rd and Tennant, SR 432 rejoins its former route and continues east to I-5. Today, SR 432 is 10.32 miles long.
Primary State Hwys Secondary State Hwys