Book excerpt: The results of a series of studies relating to simulation and analysis of inland waterway transportation systems are presented. Problems in waterway simulation experimentation, including determining the length of the transient period, identifying locks with Poisson arrival processes, and statistical analysis of autocorrelated data, are investigated. A system simulation model is used to study the operational effects of alternative means for increasing the utilization of existing capacity. A single lock simulator is applied to determine the effects of different lock processing rules, pleasure craft, and chamber separation on tow delays at various traffic levels. Several empirical equations for predicting the equilibrium speed of a tow in a river channel are derived by multiple linear regression analysis. Finally, the components and interrelationships of comprehensive waterway systems planning methodology are described, with emphasis upon techniques for predicting waterway transportation demand. (Author).