Delay Estimation on Congested Waterways
Abstract
A simulation model has been developed for estimating delays on congested waterways and a numerical method has been developed to approximate the results of the simulation model. The structural relations in the numerical method were largely based on exact analytic results from queueing theory while their unknown parameters were estimated statistically with results from the simulation model. The numerical method is valuable for screening improvement alternatives, while the simulation model is valuable for very detailed and accurate analysis. The simulation model is microscopic and event-scanning. It can accommodate generally distributed trip generations and service times, unequal parallel servers, and random failure effects. Its outputs include tow travel times along waterways, tow delays at each lock, inventory levels, expected stock-out amounts for commodities transported on waterways, and variances of interarrival and interdeparture times at each lock. The simulation model has been validated in comparisons with established theoretical results and empirical data from the U.S. inlands waterways. Lock delay models, Microscopic simulation model, Numerical method, Networks of queues, Delay function, Algorithm for one-way and two traffic systems variables and input format.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1993
- Accession Number
- ADA271689
Entities
People
- Melody D. Dai