Wsdot Regions South Central. The south central region serves the communities within asotin, benton, columbia, franklin, garfield, kittitas, yakima and walla walla counties. In washington, vanpools are operated predominantly by public transit agencies and are considered a form of public transportation.
The south central region serves the communities within asotin, benton, columbia, franklin, garfield, kittitas, yakima and walla walla counties. Olympic (ol), northwest (nw), north central (nc),.