For those interested in further reading on sample size determination as it relates to transportation data collection. see. for example. [Ferlis, 1980; Fer et al., 1981 Multisystems, 1985; Cambridge Systematics, 1996cl.
4.2 TRANSPORTATION sYSTEM AND USER DATA
Monitoring the condition and performance of the transportation system has been the primary source of transportation planning data for many years. However, data on travelers, first collected in a systematic way in the late 1940s,has since become an