Does the trial court erred in failing to hold the government liable for its failure to place adequate warnings or weight restrictions at or near a bridge?

Riebe contends the trial court erred in failing to hold the government liable for its failure to place adequate warnings or weight restrictions at or near the bridge. Riebe relies primarily upon Tanguma v. Yakima, 18 Wash.App. 555, 569 P.2d 1225 (1977), for this proposition. Tanguma involved an accident on a bridge constructed by the federal government and accepted by Yakima County. The court imposed a duty upon the county to post signs warning of any inherently dangerous or misleading condition. Id.