11.61 In the 1960s, promotion of underground utilities as an alternative to traditional overhead distribution began.The costs for two types of utilities differ, and the power company has to provide both estimates to the potential developer of the property. Stanford (Journal of Energy Engineering, 1993) reported data collected on 47 randomly selected subdivisions company files for which the costs were determined previously (Table 11.7). Both types of costs are determined for each project for two years as the material costs and various other input values change from year to year. The characteristics measured were as follows:
C1: Number of lots in the project C2: Total front-line footage of lots C3: Number of corner lots C4: Total length of streets C5: Number of cul-de-sacs C6: Total length of curved streets within the project C7: Number of accesses to the project C8: Number of intersections within the project a Develop a model to estimate the year 1 cost of developing underground utilities.
b Develop a model to estimate the year 1 cost of developing overhead utilities.
c Develop a model to estimate the year 2 cost of developing underground utilities.
d Develop a model to estimate the year 2 cost of developing overhead utilities.