The "Covert Act" of 1915 provides a method bj- 

 which the owners of GO per cent of tlie land fronting 

 on a highway whicli it is desired to improve may 

 petition for its improvement, whereon the county 

 road commission or the State Highway Commissioner 

 cooperates in the drafting of specifications and the 

 letting of contracts. Such roads serve as feeders to 

 main highways or links in incomplete systems, and 

 have been constructed beyond \vhat was anticipated 

 when the act was first adopted. 



Seven classes of roads are recognized by the law, 

 in accordance with which the reward the State allows 

 the road district responsible for construction is de- 

 termined. Lowest in this classification is a road of 

 class A — a sand-clay road, whose basic width of 

 metalled surface is nine feet and whose grade does 

 not exceed G per cent, except where circumstances 

 warrant a departure from this maximum in accord- 

 ance with specifications approved by the State High- 

 way Commissioner. The reward is 25 per cent of 

 the cost but may not exceed $3,000 a mile. To June 

 30, 1920, 201 miles of road of this class had been 

 built. 



The six remaining classes have similar require- 

 ments as to grade, contour, and basic width, but 

 vary the State reward according to the materials used 

 and the width of roadway constructed. Thus a road 

 of class B is composed of gravel or burnt shale. A 

 class C road is made in two courses; at the bottom, 

 crushed stone or slag, and a top course of gravel or 

 blast furnace slag. D class roads have a bottom 



