Evolution of the TRANSYT model in a developing country

Rodrigo Fernandez*, Eduardo Valenzuela, Federico Casanello, Carola Jorquera

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


TRANSYT has been used in Chile since the early 1980s for cost-benefit analysis of infrastructure and traffic management projects. It is also the main tool of the Area Traffic Control Unit of Santiago de Chile since mid 1990s. As a result of this experience, many methodological improvements to the model have been done in order to take into account local conditions. This paper presents a review of these methodological as well as practical advances on the TRANSYT model made in the Chilean context during the past 15 years. Issues considered are cruise time distributions, the cycle-time selection method, saturation flows and car equivalents, public transport modeling, peak-hour delay calculation, modeling unsignalized intersections and zebra crossings, and fuel-consumption estimation.

Original languageEnglish
Pages (from-to)386-398
Number of pages13
JournalTransportation Research Part A: Policy and Practice
Issue number5
StatePublished - Jun 2006
Externally publishedYes

Bibliographical note

Funding Information:
This work has been funded by an applied research project for the Area Traffic Control Unit of Santiago de Chile (UOCT). We are grateful of Fernando Jofré, UOCT Director, and Ana María Flores, UOCT Engineer, for their help. Professor Jaime Gibson of University of Chile provided useful comments during the research that generates this paper. CEng students of University of Chile Andrés Valenzuela and Madeleyne Ricaldi help with data collection at zebra crossings.


  • Developing countries
  • Modeling
  • Traffic


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