The highway is primarily a two-lane road between Benton City and Richland, however the road expands to three, then four lanes wide in West Richland, which the highway remains as to its terminus in Richland.
The highway is primarily a two-lane road between Benton City and Richland. The road expands to three. This is then four lanes wide in West Richland. The highway remains as to its terminus in Richland West Richland.