MISCELLANEOUS. 



457 



Secono CLASS 

 Section in Cut 



STANDARD CROSS-SECTIONS FOR EARTH ROADS. IOWA HIGHWAY 

 COMMISSION. 



amount of the slope amounts to about one inch raise 

 to one foot of width of the roadway. The accompany- 

 ing figure shows standard cross-sections for earth roads 

 in Iowa, and the lower figure shows a recently con- 

 structed road with a standard cross-section. This 

 cross-section is such that it can be readily built with a 



A ROAD BUILT TO STANDARD. THE ROAD ROLLER AND SCRAPING 

 GRADER AT WORK. 



