Proceedings of the Annual Convention, Volúmenes13-14

Allegheny county American Road Builders amount Applause asphaltic concrete Association automobile binder course bituminous material bituminous surface treatment Bldg block pavements bond issue brick bridge broken stone building built California cement cent CHAIRMAN coat concrete roads Contractor cost county highways crete discussion district Engr expense exposition filler foundation Gentlemen give going grade gravel road grout heavy Highway Commission highway department highway engineer hundred improvement inches laid macadam maintenance Massachusetts Highway Commission meeting ment method mileage miles million dollars mixed necessary Pacific Highway Panama canal paper paving Portland cement present PRESIDENT STEVENS proper question repair resurfacing road construction roadway rolled roller sand sheet asphalt square yard street subgrade tests thing TILLSON tion town traffic United vehicles Warren Brothers Washington wearing course wearing surface width York