Xuesong Zhou at the University of Utah has made available the second beta release of NEXTA for TRANSIMS. NEXTA is a tool for creating and editing traffic networks and for viewing DTA simulation results.  This release (08/18/09) provides the following new features:

• Time-dependent travel time contour
• Bottleneck visualization
• Turning movement delay visualization
• Link MOE sorting and exporting 

The installer, sample data set and user guide can be downloaded at http://www.civil.utah.edu/~zhou/NEXTA_for_TRANSIMS.html

Welcome to the new site! There were a lot of upgrades and changes behind the scenes, including a new hosting company. The wiki is up again! The biggest change you will see is in the forums with the new Agora software.

There were some problems in the move to the new site. A major crash occurred while transferring the forum posts to the new site. The crash, combined with schedule concerns, means that information posted in May and early June is lost. The crash also wiped registrations during this period. Recovering this information would have required more administration time and resulted in increasing site down time. This was a difficult decision, but it really was time to get the site up and running again.

If your member registration was lost, please re-register. If you encounter problems, please email me at This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Thank you for your patience during this transition.

Version 4.04 is available on Sourceforge at the project download page.

See the package changelog on the sourceforge release page for details on bug fixes and new features.

After weeks of downtime, the site is now back online with just basic features. Work to recover the site is ongoing and will probably take another week. Thank you for your patience.

If you haven't already done so, consider subscribing to the transims-l listserv. The listserv provides another band of communication within the community. See http://tmip.fhwa.dot.gov/transims/email_list/ for instructions. The page also has a link to the message archive if you'd like to get a sense of the email traffic before signing up.

A training course is scheduled for  January 27-29 in Moreno Valley, CA.

The Transportation Research and Analysis Computing Center at Argonne National Laboratory and the City of Moreno Valley will hold a TRANSIMS training course on January 27-29 at the city's Conference and Recreation Center. The course targets analysts new to the TRANSIMS methodology, and covers both the theoretical underpinnings as well as the practical application of the code. Participants will develop a full understanding of the general TRANSIMS principles, implementation details, data requirements, capabilities, and limitations of the software.

Now available on the sourceforge downloads. The download page is here

Thanks to David, Hubert, and Rick for making this happen!

Now available for download, these slides cover lessons learned in two open source research community development efforts in the traffic modeling and simulation domain: TRANSIMS and NGSIM. Although different types of federally-sponosored open source research communities, one can draw several similar observations regarding the two communities. The slides address fundamental issues for both communities ranging from motivating participation, maintaining infrastructure, and adapting for self-governance.

Actually it's 4.02.02, but who's counting?  Check the TRANSIMS project download page here. The new version rolls up a lot of bug fixes, new functionality for existing programs and some new utilities as well. A new installer package is also available. To see what's in the new version, read the 4.02 changelog in the documention set or check the wiki 4.02 changelog page. Post to the software workshop in the 4.02 release thread for any comments on the changes. Bugs reports and requests for help should be posted in the usual locations.

Thanks David, Hubert, and Tom for making this happen!