Table 3 — Transportation cost estimation equations' 





Northern Region 



Intermountain Region 



Variable 



Coefficient 



Standard error 



Coefficient 



Standard error 



Constant 



-7.96 



3.75 



-8.93 



242 



1/ADBH 



225.61 



35.04 



322.43 



28.56 



UHAUL 



.98 



.05 



1.01 



.04 



PHAUL 



.44 



.05 



.50 



.03 



DUSTR 



4.92 



1 .65 







R 2 





.76 





.91 



'See table 7 for possible adjustment. 









Table 4 — Slash cost estimation equations 









Northern Region 



Intermountain Region 



Variable 



Coefficient 



Standard error 



Coefficient 



Standard error 



Constant 



11.59 



2.83 



4.53 



3.52 



SPACE 



.05 



.01 



.02 



.01 



VPA 







-.48 



.11 



1A/PA 



77.47 



16.38 







ADBH 



-.48 



.16 







1/ADBH 







149.80 



41.31 



FLAT 



-.01 







-.002 



.001 



%CC 







.04 



.02 



%GSL 



-.11 



.05 







#UNITS 



.27 



.06 







R 2 





.42 





.50 



Table 5 — Permanent road cost estimation equations 





Northern Region 



Intermountain Region 



Variable 



Coefficient 



Standard error 



Coefficient 



Standard error 



Constant 



2.84 



2.13 



-9.72 



3.20 



STEEP 







.03 



.01 



NEW" 2 



8.12 



1.05 



9.20 



1.15 



RECON" 2 



2.93 



1.10 



4.10 



1.09 



1/VOL 







31,321.00 



8,516.00 



R 2 





.35 





.55 



5 



