towers of the drawbridge with counterweights and sections of the arched truss interstate columbia river bridge in the rays of the

bridge arched sunlight lifting counterweights draw tower transportation columbia river hoist transport road highway truss rotation walkway roadway summer oregon green mountain northwest wave landscape engineering architecture perspective roadside arch interstate barrier national support commercial outdoors transporting logistics artery connection connect hoisting safety intersection drawbridge american walking traffic landmark moving poles tension run drive travel pass tourism western trees washington nature railing strategic structure steel towers sections rays operated ship passage industrial freight connecting portland vancouver vancouver