Investigation of National Highway System Roadways in the HSIS States. Zegeer, C. V., Huang, H. F., Stewart, J. R., & Williams, C. D. Technical Report FHWA RD-98-114, Federal Highway Administration, 1998, 1998. bibtex @techreport{RN615,
author = {Zegeer, Charles V. and Huang, Herman F. and Stewart, J. Richard and Williams, Carolyn D.},
title = {Investigation of National Highway System Roadways in the HSIS States},
institution = {Federal Highway Administration},
number = {FHWA RD-98-114},
type = {HSIS Summary Report},
month = {1998},
year = {1998},
type = {Report}
}