High speed railways can be considered as a new railway class which is provided by enhancing the criteria’s like level of service
parameters, infrastructure and capacity of conventional railways for more than forty years. A rapid entrance to high speed railway
sector has been emerged in Turkey that important investments have been done and is done. Firstly, Ankara-Eskişehir High Speed
Railway Line has been completed, then Ankara-Konya High Speed Railway Line was started to operate, after that Eskişehir-
Konya High Speed Railway line connection has been opened. Objectives of the thesis are expressing the development period of
the sector, evaluation of high speed railway definitions, researching on the perspectives of level of service parameters and
capacity and making compares with other modes.