The Authors 



RULON B. GARDNER is Principal Research Engineer stationed at 

 the Forestry Sciences Laboratory in Bozeman, Montana. He 

 has been involved with logging and forest road construction 

 for the Forest Service in various capacities for 18 years — the 

 past 10 years in a research capacity. 



WILLIAM S. HARTSOG is a Research Engineer, Forest Engineer- 

 ing Research, stationed at the Forestry Sciences Laboratory 

 in Bozeman, Montana. He has been involved with logging and 

 forest roads on various assignments for 5 years. 



