Northwest National Laboratory. The Bypass Highway is followed to the west by the Tri-City Railroad, formerly the main rail link to the Hanford Site and now owned by the Port of Benton, and to the east by the multi-use Urban Green Belt Trail. The highway travels south around Richland's suburban neighborhoods and passes the Richland Airport. SR 240 intersects SR 224 at Van Giesen Street, providing connections to West Richland and Benton City, and continues southeast along the Yakima River to the Chamna Natural Preserve. At the park, SR 240 crosses over and intersects Interstate 182 (I-182) in a trumpet interchange, beginning a short concurrency with I-182 and the already-overlapping U.S. Route 12 (US 12). The three highways continue east for approximately and reach a combination interchange with George Washington Way, a local road that carries part of SR 240 Business. From the interchange, SR 240 turns south and crosses the Yakima River towards Kennewick, while I-182 and US 12 continue east across the Columbia River to Pasco. SR 240 continues across the Yakima River Delta as a fully grade-separated freeway, fronted to the west by a branch of the Union Pacific Railroad and the east by the Sacagawea Heritage Trail. The freeway narrows to six lanes at an interchange with the Columbia Park Trail in the Richland Wye and to four lanes at a partial cloverleaf interchange with Columbia Center Boulevard, located north of the Columbia Center Mall and the Toyota Center. SR 240 enters Kennewick after the interchange and continues along the south side of the Columbia River and Columbia Park, passing north of suburban neighborhoods and the Vista Field airport, which closed in 2013. The freeway intersects Edison Street and Columbia Park Trail on the north side of the railroad before reaching its eastern terminus, a dogbone interchange with US 395 at the south end of the Blue Bridge. The interchange also includes direct ramps to the northbound lanes of US 395 as well as access to Columbia Drive, a local street that connects to downtown Kennewick. The junction is located near the site where the Kennewick Man, a skeleton belonging to a 9,000-year-old man, was discovered in 1996. SR 240 is maintained by the Washington State Department of Transportation (WSDOT), which conducts an annual survey on the state's highways to measure traffic volume in terms of average annual daily traffic. The busiest section of the highway,