1. Stein-HudsonK. E., SloaneR. K., JacksonM. C., and BlockA. J. NCHRP Report 376: Customer-Based Quality in Transportation. TRB, National Research Council, Washington, D.C., 1995, p. 4.
2. Conference Proceedings 14, Information Needs to Support State and Local Transportation Decision Making into the 21st Century. TRB, National Research Council, Washington, D.C., 1997, 70 pp.
3. LomaxT., TurnerS., ShunkG., LevinsonH. S., PrattR. H., BayP. N., and DouglasG. B. NCHRP Report 398: Quantifying Congestion. TRB, National Research Council, Washington, D.C., 1997, 108 pp.