THE MACADAM PAVEMENT 71 



The Macadam Pavement. The telford pavement has 

 been but seldom used, since the driving in parks has been 

 light and the heavier telford foundation has been found 

 unnecessary. It may be employed in the future owing to 

 the increased weight of vehicles. The park macadam 

 pavement has been constructed much lighter than the 

 municipal pavement. Its thickness is 6 or 7 inches. 



Heavier pavements are now coming into use. The 

 ordinary water-bound macadam pavement often answers 

 very well. Its cost is low and it affords a good foothold 

 for horses. Where automobile traffic is heavy it will 

 be necessary to treat the surface by the usual methods 

 with crude petroleum, asphalt road oil or other preparation 

 described at length in modern treatises on pavements. 

 Bituminous concretes are giving excellent results for park 

 pavements. Calcium chloride has met with some success 

 in the East as a dust palliative. 



Heavier pavements will be used in the future. The 

 macadam pavement as heretofore constructed serves very 

 well for carriage driving, but must now be treated with crude 

 petroleum, tarvia, asphalt road oil or other similar prep- 

 aration if heavy traffic is anticipated. 



The Brick Pavement. This pavement possesses marked 

 advantages in durability, but has the drawback of being 

 noisy under horses' hoofs and steel tires. It has been used 

 at Indianapolis for the construction of an automobile 

 speedway. It is a more expensive form of pavement than 

 the macadam, but is permanent. The maintenance charges 

 for this style of pavement are very low. 



Curb. Brick drives are always lined with curb and 

 macadam pavements are occasionally. For brick pave- 

 ments the curb may be either raised or flush with the 

 surface. In the case of macadam pavements it is always 



