If, in a county, a road or highway originally located, laid out, constructed, relocated, opened, straightened, widened, extended or altered or any part of the road or highway vacated, the viewers appointed to assess damages in accordance with 26 Pa.C.S. (relating to eminent domain), after determining the amount of damages sustained, shall assess the whole or part of the damages as may be represented by benefits upon the properties abutting on and benefited by the improvements. The remaining part of the damages, if any, not assessed against the abutting properties, shall be paid by the county. The total assessments for benefits shall in no case exceed the total damages awarded and agreed upon.
16 Pa.C.S. § 16910