Feasibility study on the purchase of railway rolling stock by Szybka Kolej Miejska Sp. z o.o. (Rapid Urban Railways) to improve the transport and services of the “airport lines” (ongoing project) 

  Feasibility study for the project “Improving railway access to the regional airports via purchasing rolling stock and constructing a siding and station/halt at the premises of Modlin airport, including the construction of a level crossing at the siding with national road no. 62, along with a halt at the airport as well as the purchase of 16 4-car EMUs (2009) 

  Feasibility study for the comprehensive modernisation/construction of new line sections, preparation of technical parameters for traction maintenance and rolling stock purchase by Warszawska Kolej Dojazdowa, the section on: institutional and legal analysis, identification of land ownership, traffic analysis, analysis of the optional traction operation, preliminary selection of rolling stock, financial and economic analysis, evolution from the perspective of EU policies, environmental impact assessment, multi-faceted analysis of investment conditions (2007)

   Analysis of conditions of the common transport tariff for public transport within the Warsaw conurbation (2007) 

  Preliminary concept for urban railway services for Krakow, Poznań and Wrocław conurbations (2007) 

  Audit of activities undertaken in terms of public transport in Warsaw and its conurbations (2007) 

  Analysis of the legal conditions for the implementation of a railway transport services system under the name of Wrocławka Kolej Aglomeracyjna from 1 January 2008 (2006)

  Analysis of the characteristics and basic parameters of the tram and bus systems for the Warsaw conurbation 

  Assessment of the possibility and usability of introducing buses on selected tram tracks in Warsaw 

  Ways of connecting the Warsaw Commuter Railway with the tram network in Warsaw

  Preparatory study on the modernisation of selected tramlines in Warsaw 

  Analysis of the functional and traffic options for the transport system in the Warsaw agglomeration, particularly in the field of rail transport