ROADS AND BRIDGES 297 



COST OF ROADS OF VARIOUS -WIDTHS 



The cost of roads varies not only with the depth of material used, 

 but also with the width. The following note of explanation and 

 tables regarding the number of square yards in a mile of road of 

 different widths and the cost of roads of different widths at a 

 given price per square yard are quoted from the Report of the 

 Commissioner of Public Roads of New Jersey: 



"Any variations from the prices given can be quickly ascer- 

 tained by adding, subtracting, multiplying and dividing for a less 

 or greater width. For example, a road 8 feet wide has 4,693J 

 square yards in 1 mile. To obtain the number of square yards 

 in a road having a width of 9 feet, add -J to the foregoing figures, 

 and in one having a width of 7 feet, subtract ; in one of twice the 

 width given in the table multiply by 2." 



Square yards in one mile of road. 



8 feet in width 4,693 1-3 sq. yds. 



10 5,866 2-3 



12 7,040 



14 8,213 1-3 



16 9,3862-3 



18 10,560 



Number of square yards and cost per mile for different widths and 

 various prices per square yard. 



Width in Number Cost per Cost per 



feet sq. yds. sq. yd mile 



8 4,693 1-3 $0.25 $1,173.33 1-3 



10 5,8662-3 .25 1,466.662-3 



12 7,040 .25 1,760.00 



14 8,213 1-3 .25 2,053.33 1-3 



16 9,3962-3 .25 2,346.662-3 



18 10,560. .25 2,640.00 



8 4,693 1-3 .30 1,408.00 



10 5,8662-3 .30 1,760.00 



12 7,040 .30 2,112.00 



14 8,213 1-3 .30 2,464.00 



16 9,3862-3 .30 2,816.00 



18 10,560 .30 3,168.00 



8 4,693 1-3 .35 1,642.66 2-3 



10 5,866 2-3 .35 2,053.33 1-3 



12 7,040 .35 2,464.00 



14 8,213 1-3 .35 2,874.66 2-3 



16 9,386 2-3 .35 3,285.33 1-3 



18 10,560 .35 3,696.00 



8 4,693 1-3 .40 1,877.33 1-3 



10 5,8662-3 .40 2,346.662-3 



12 7,040 .40 2,816.00 



14 8,231 1-3 .40 3,285.33 1-3 



