The last stretch of U.S. 35 to be widened to four lanes is expected to open to traffic by the end of August after years of planning. The 15-mile segment is the last part of U.S. 35 from Interstate 64 to the West Virginia-Ohio state line to be upgraded. The state Department of Transportation said the project’s cost was $255 million and runs from the Beech Hill community in Mason County to the Buffalo Bridge in Putnam County. The project included eight bridges and a new interchange at the junction of U.S. 35 and West Virginia 869.