THIRD ANNUAL YEAR BOOK — PART I. 



41 



amount abraded by traffic and carried off by the wind and rain, or the 

 way will soon wear down to such an extent that drainage will become 

 a very difficult problem. As the traffic of most roads increases slowly, 

 the adjacent earth can first be used for repairs, then gravel or crushed 

 stone. These, however, are problems to be solved by those familiar with 

 the local conditions and should be regulated by the requirements of 

 traffic, the availability of material, and the cost of necessary repairs. 

 The large majority of roads for some time to come will require only 

 earth for their construction, and for this reason it is essential to the 

 prosperity of each community that the earth road be properly cared for. 



