Bilder: Trafikverket

About KAJT

The Swedish Transport Administration (Trafikverket), along with six academic partners, Linköping University, Blekinge Institute of Technology, Royal Institute of Technology, SICS Swedish ICT, The Swedish National Road and Transport Research Institute (VTI), and Uppsala University, are jointly running a research program known as “Capacity in the railway traffic system” (in Swedish: Kapacitet i järnvägstrafiken – KAJT). The program was established in January 2013. The core activity is in the development of processes and innovations in the field of capacity planning and traffic management from operational service to 40 years in the future.

The vision is to develop the railway traffic system to that it becomes more flexible, more efficient and more reliable in order to achieve an efficient capacity in the railway system for the benefit of citizens and industry during the entire trip / transport in the total transport system.



The objectives of the research program Capacity in the railway traffic system are:

    Through research contribute to better use of the railway system for citizens and business.

    To perform research and research education within the core and complementary research areas and to publish results both in scientific journals and in other ways.

    To include consideration to all stakeholders' issues: citizens, businesses, infrastructure manager, railway undertakers, maintenance contractors and railway system suppliers.

    To promote that the research findings will be developed into applicable processes and tools.

    To contribute to the development of skills both within and outside the research program.

    Strengthening cooperation between the parties through joint activities such as collaborative projects, seminars, conferences, and graduate courses.


Core Research Area

The core research area defines the program's primary competence and focus. Within the core area, the partners of the research program are Sweden's leading research resource. The partners together hold leading expertise to conduct research in all aspects of the field.

The program's core research area is Capacity planning and traffic control, from operations to 40 years in the future. This includes aspects such as:

  •     Analysis and management of the railway capacity in the long term and short term
  •     Allocation of train paths and construction of schedules
  •     Coordination between the infrastructure manager’s and railway undertakers’ interests in the timetable
  •     Rollout of the timetable in operational traffic
  •     Monitoring and analysis of the traffic.

The core research area is divided into four focus areas:

  •     Traffic and infrastructure
  •     Tactical traffic planning
  •     Operational traffic control and train driving
  •     Maintenance and traffic

Within the core area, the research program will develop methods and processes applicable for the stakeholders.

The scope of the research is not static, but is determined by the Board of the program.


Complementary Research Areas

The complementary research areas define areas that also should be explored, but these areas are closer to the core areas of other Swedish research centers. For the complementary areas, it is important to consider the research at other centers. Therefore, the complementary areas are often very suitable for cooperation with other research centers.

The complementary research area includes:

  •     Correlation between rail traffic and track maintenance aspects
  •     Correlation between rail traffic and economical aspects
  •     Correlation between rail traffic and rail vehicle aspects
  •     Correlation between rail traffic and track-technical aspects
  •     Correlation between rail traffic and other modes of transport



The research program should aim at that the program and its partners will be internationally recognized players who are invited to international collaborations. The program will be internationally active, particularly in the EU, enhance visibility of its profile and business, and work for the retrieval of both knowledge and research funding from the EU. From an international perspective, the Swedish transportation research is small, therefore collaborations with other internationally recognized partners and retrieval of knowledge is particularly important.

Contact and further information

For more information about the research program, please contact the program coordinator Martin Joborn, e-mail:, phone +46 705 709 992.

Branschprogram Kapacitet i Järnvägstrafiken

Postadress: Branschprogram KAJT, c/o SICS Swedish ICT, Box 1263, 16429 Kista

E-post:    Telefon: +46 (0) 705 709 992