Stating that asphalt, brick and concrete-slab road-surfaces are the only pavements that have given satisfaction for automobile traffic, the author believes further that thus far the concrete-slab surface is the only one worthy of consideration for such traffic. He discusses the merits and demerits of these surfaces and includes an enumeration of the factors that combine to produce a thoroughly satisfactory road surface.
Passing to a detailed review of the bearing value of soils and the correction of road failures, the author presents data and illustrations in substantiation of his statements and follows this with a consideration of the reinforcing of a concrete road-slab with steel.
Regarding the ultimate highway, it is stated that a concrete-slab road, about 8 in. thick and of uniform depth across the road, perhaps with an increaseed thickness of integral supporting curb-block on the edges in some locations, is the type of road that should be built in this country, and reasons in support of this are given. The subject of impact is discussed and its meaning explained.


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