Optimal Increase of Single-Line Railway Route Capacity by Developing a Train Management Schedule Technique

Document Type : Research Paper


1 Ph.D. candidate in Civil Engineering, Transportation Planning, University of Shomal, Amol, Iran

2 Assistant Professor, Faculty member of Civil Engineering, Transportation Planning, University of Shomal, Iran


Rail transportation plays a significant role in the movement of commodities and passengers. The progressive demand for transporting passengers and commodities with limited capital available to develop rail infrastructure challenges the rail system ability for transportation by trains. There are two general ways to improve capacity in a route, including new investment in infrastructure and improving the performance of existing lines. In the present study, time management was used to increase the capacity of existing railways. A new rescheduling model is proposed in this research to overcome some of the current constraints called “Optimal increase in the capacity of lines.” This model uses the conflict solution technique and timetable compaction and can be used for one, two, and multi-line routes. A case study was conducted for part of a single-line BADROOD-ISFAHAN route, in which significant results were obtained. After process1, more than 25 initial timetable schedule conflicts were resolved in both Same Orders and Order Free approaches. After process 2, the OPTIMAL INCREASE model could compress the timetable by almost one hour and improve maximum dwell times (from 61to30 min) and total dwell times (from 271to168 min) of trains at stations. The total duration of the timetable was increased by almost 20 minutes. After process3, the OPTIMAL INCREASE model provided approximately 36minutes shorter timetable duration (better capacity utilization). Also, the results show that the duration of timetabled developed was slightly increased, mainly due to the sizable reduction in maximum dwell time from 61 minutes to 10 minutes.


- Sajjad Sadr, Davood Arab Khabouri, and Mostafa Namazi, “Modeling of electric train speed control system with regard to wheel slip on rails”, Journal of Modeling in Engineering, V. 14, N. 47, Winter 2016, pp. 255-266.
-  Hao Li, Xiaowei Liu, Kun Yang. “Capacity Optimization of High-speed Railway Train in Established Schedule Plan Based on Improved ACO Algorithm”. 3rd International Conference on Modelling, Simulation and Applied Mathematics, March 2018.
- SuchithraRajendran ,MaximilianPopfingerc , “ Evaluating the substitutability of short-haul air transport by high-speed rail using a simulation-based approach” , journal of Transportation Research Interdisciplinary Perspectives , Volume 15, September 2022, pp.1-13.
- Manish Kumar ,SharmaBhavesh Kumar Chauhan , “ Timetable rationalization & Operational improvements by human intervention in an urban rail transit system: An exploratory study” , journal of Transportation Research Interdisciplinary Perspectives , Volume 13, March 2022, pp10-26.
-  Ali Salmasnia, Amir Hamed Hosseinzadeh, and Behnam Abdzadeh, “Multi-objective optimization for average travel time on metro lines with considering spatial effects and scattering, simultaneously”, Journal of Modeling in Engineering, V. 16, N. 52, Spring 2018, pp. 331-345.
-  Seyed Mohammad Hossein Dehnad and Alireza Nouri, “Using integrated simulation of vehicles and pedestrians in evaluating urban train policies (case study of a Tehran metro line)”, Journal of Engineering Modeling, V. 19, N. 66, 2022, pp. 331-345.
-  Landex, A., Kaas, A. H., Schittenhelm, B., Schneider-Tilli, J., “Evaluation of railway capacity”, The Annual Danish Transport Conference, Aalborg University, Denmark, Aug 2006.
-  Lai, Barkan, C. “A comprehensive decision support framework for strategic railway capacity planning”,TRANSPORT Journal, Vol 29 , No 1 ,  Mar 2011, pp 738–749.
-  Abril, M., Barber, F., Ingolotti, L., Salido, M.A., Tormos, P., Lova. “An Assessment of Railway Capacity”, Transportation Research Part E: Logistics and Transportation Review,Vol 44, Issue 5, September 2008, pp 774-806 .
- Kraay, D., Harker, P.T., Chen, B.,” Optimal pacing of trains in freight railroads: model formulation and solution”, Operations Research, Vol 39, No 1, Feb 1991, pp 82–99.
- Ghoseiri, K., Szidarovszky, F., Asgharpour, M.J. “A multi-objective train scheduling model and solution”, Transportation Research Part B: Methodological, Vol 38, Issue 10, December 2004, pp 927-952.
- Masoudighini, Nariman Niko and Mohammad Tamnaei, "Presenting a Method for Investigating Strategies to Increase Railway Line Capacity Using Optimization Method with Case Study of Badroud-Ardakan Route", Journal of Transportation Engineering, Year 3, Issue 2, Winter 2011, Pp. 173-159.
-  Higgins, A., Kozan, E., Ferreira, L. “Optimal scheduling of trains on a single line route”. Transport”, Transportation Research Part B: Methodological, Vol 30, Issue 2, April 1996, pp 147-161.
-  Burdett, R.L., Kozan, E. “Techniques for absolute capacity determination in railways”, Transportation Research Part B: Methodological,Vol 40, Issue 8, September 2006, pp 616-632.
-  D’Ariano, A., Pacciarelli, D., Pranzo, M. “Assessment of flexible timetables in real-time traffic management of a railway bottleneck” , Transportation Research Part C: Emerging Technologies, Vol 16, Issue 2, April 2008, pp 232-245.
-  Lindner, T. “Applicability of the analytical UIC Code 406 compaction method for evaluating line and station capacity”, Journal of Rail Transport Planning & Management, Vol 1, Issue 1, November 2011, pp 49-57.
- Corman, F., D’Ariano, A., Hansen, I.A., Pacciarelli, D.” Optimal multi-class rescheduling of railway traffic” , Journal of Rail Transport Planning & Management, Vol 1, Issue 1, November 2011, pp 14-24.
- Sun, Y., Cao, C., Wu, C.” Multi-objective optimization of train routing problem combined with train scheduling on a high-speed railway network”, Transportation Research Part C: Emerging Technologies,Vol 44, July 2014, pp1-20.