Bui. 373, U. S. Dept. of Agriculture, 



Plate I. 



OPRRE 124C9 



FiQ. 1.— Failure of Brick Road near Zanesville, Ohio, Due to Defective 

 Gravel Foundation and 11 -Ton Motor-Truck Traffic. 



OPRRE 13006 



Fig. 2.— Failure of Brick Road near Mansfield, Ohio, Due to Defective Con- 

 struction AND Heavy Motor-Truck Traffic. 



