Software and Data

Free Software:


The NETCELL Simulation Package software (version 1.01) described in this report is now available for download free of charge. By downloading these files, it is expressly understood that this software is unsupported. Should you desire to make financial arrangements for technical support in the future, please contact the Institute of Transportation Studies.

"The NETCELL Simulation Package: Technical Description", California PATH Research Report, UCB-ITS-PRR-97-23, May 1997 (with R. Cayford and W. Lin).


This report describes the NETCELL simulation package. NETCELL is a freeway network simulation program based on the cell transmission model which captures the dynamic evolution of multicommodity traffic over a freeway network with three-legged junctions in a way that is consistent with the hydrodynamic theory of highway traffic. NETVIEW is a graphical postprocessor for viewing NETCELL output files.

This document discusses implementation of the programs in detail, including the cell representation for a freeway network with three-legged junctions, data and file structures, inputs and outputs, and some key algorithms developed to model traffic progression in junctions. The memory and computational time requirements for the program are also estimated. An example for a small network with a single origin, two destinations, and a single diverge junction is included. This report also includes a user's guide to the NETVIEW program.

The NETCELL program is based on a prototype program written in 1994. This version incorporates some enhancements to the model and memory handling improvements to allow NETCELL to model very large networks. This version of the NETCELL program should be useful for use as a research and engineering tool.

Keywords: traffic simulation, traffic flow model, transportation network, traffic congestion management, dynamic traffic assignment.



San Pablo Dam Road Data

For a description of these data and the San Pablo Dam roadway, please see:

"Some observations of highway traffic in long queues", Research Report UCB-ITS-RR-98-6, December, 1998 and Transportation Research Record (in press, 1999) (w/ K. Smilowitz, M. Cassidy and R. Bertini ).

Raw data files - in text format

Final data files - in Excel spreadsheets

NOTE: You will need to unzip the files; if you are using Windows 95/98/NT you can download this file winzip95.exe, run this file and it will install WinZip for you on your computer.

I-880 Data

Raw data files - in zip format