TRANSIMS (TRansportation ANalysis SImulation Systems
TRANSIMS is one part of the multi-track Travel Model Improvement Program sponsored by the U.S. Department of Transportation, Environmental Protection Agency, and Department of Energy with the purpose of developing new, integrated transportation and air quality forecasting procedures necessary to satisfy the Intermodal Surface Transportation Efficiency Act and the Clean Air Act and its amendments.TRANSIMS is a set of integrated analytical and simulation models and supporting databases. The base set of technologies includes modules to develop a synthetic population, activity list, and to route travelers between activities to simulate second-by-second movements on a transportation infrastructure. Feedback methods for stabilizing the simulation and for modeling some of the transportation characteristics are fundamental elements of the TRANSIMS framework.
The TRANSIMS framework simulates the daily activities and movements of individuals in an urban region. The individuals are synthetic - they do not represent specific people - but are statistically indistinguishable from the actual census. Conversely, the locations visited by individuals are real street addresses that reflect actual land-use patterns in a region.
TRANSIMS provides the following information about the synthetic population and its mobility:
- Household structure and demographics
- Activity locations, times, and durations
- The number of trips between activities, including route plans and execution of the route plans in the transportation network
The U.S. Department of
Transportation provides additional details on TRANSIMS, including
the latest version of the source code. Commercial support is
available from IBM.
Documentation for the current release is available
here.
Selected Publications
- C. Barrett, K. Bisset, R. Jacob, G. Konjevod, and M.V. Marathe. An Experimental Analysis of a Routing Algorithm for Realistic Transportation Networks. Proc. European Symposium on Algorithms (ESA). Rome, Sept. 2002.
- M.V. Marathe. Routing in Very Large Multi-Modal Time Dependent Networks: Theory and Practice. Proc. Algorithmic Methods and Models for Optimization of Railways (ATMOS 2002), Malaga, Spain, 2002.
- C.L. Barrett, R.J. Beckman, K.P. Berkbigler, K.R. Bisset, B.W. Bush, S. Eubank, K.M. Henson, J.M. Hurford, D.A. Kubicek, M.V. Marathe, P.R. Romero, J.P. Smith, L. L. Smith, P.L. Speckman, P.E. Stretz, G.L. Thayer, E. Van Eeckhout, and M.D. Williams. TRANSIMS Volume Two – Networks and Vehicles. Los Alamos Unclassified Report 00-1724, Aug. 2004.
- R. Jacob, M.V. Marathe, and K. Nagel. A Computational Study of Routing Algorithms for Realistic Transportation Networks.
- Invited paper appears in the special issue of ACM J. Experimental Algorithmics containing selected papers presented at the 2nd Workshop on Algorithmic Engineering, 4(6) 1999. http://www.jea.acm.org/1999/JacobRouting/.
- C.L. Barrett, R.J. Beckman, K.P. Berkbigler, K.R. Bisset, B.W. Bush, S. Eubank, K.M. Henson, J.M. Hurford, D.A. Kubicek, M.V. Marathe, P.R. Romero, J.P. Smith, L. L. Smith, P.L. Speckman, P.E. Stretz, G.L. Thayer, E. Van Eeckhout, and M.D. Williams. TRANSIMS, Volume Three – Modules; Chapter 1 - Framework; Chapter 2 - Population Synthesizer; Chapter 3 - Activity Generator; Chapter 4 - Route Planner; Chapter 5 - Traffic Microsimulator; Chapter 7 - Emissions Estimator; Chapter 8 - Output Visualizer.
- Los Alamos Unclassified Reports 00-1725 and 00-1767, Aug. 2004.
- C.L. Barrett, R.J. Beckman, K.P. Berkbigler, K.R. Bisset, B.W. Bush, S. Eubank, K.M. Henson, J.M. Hurford, D.A. Kubicek, M.V. Marathe, P.R. Romero, J.P. Smith, L. L. Smith, P.L. Speckman, P.E. Stretz, G.L. Thayer, E. Van Eeckhout, and M.D. Williams. TRANSIMS Volume Four – Calibrations, Scenarios, and Tutorials. Los Alamos Unclassified Report 00-1766, Aug. 2004.
- C. Barrett, R. Jacob, and M.V. Marathe. Formal Language Constrained Path Problems. SIAM J. Computing, 30(3) 2001: 809–837.