122 Landscape Gardening 



of broken stone or not, the rounded surface and gutters are 

 a necessity for a good road. 



The surface of the road must be given more or less crown- 

 ing, according to the material used. The poorer or more 

 loamy the material the more must it be crowned or rounded. 



FIG. 68, A Properly Constructed Bar. 



The shoulders made by the settling of the centre of the road, 

 and by growth of grass and washing of the fine particles 

 from the centre, should be removed whenever they are so high 

 as to interfere with the quick passage of the surface-water 

 to the side gutters. Gutters or ditches must be provided 

 along the roadsides to prevent surface-water from washing 



FIG. 69. An Improperly Constructed Bar. 



up on the road surface and to catch and carry off quickly 

 the wash from the road. These ditches must have frequent 

 outlets and be without basins in which the water will stand. 

 On hillsides frequent light bars should be made, and be kept 

 in such condition at all times that no water will run over them 

 into the middle of the road. They should start from the mid- 

 dle of the road and run diagonally to each side (Fig. 68) and 



