Bus lanes should be integrated into the transportation network in an efficient way,
while the location-specific features and the function of the certain section should
be handled, too. The scope of this article is the elaboration of a method, which can
help to determine, in which cases the establishment or existence of a bus lane is
reasonable. With the method the processes can be analyzed in three steps: the arising
transportation demands are handled, the questions of feasibility are reviewed, and
the expected traffic situation after the establishment is estimated. The reasonable
action in the section is calculated by the determination of the total time loss.