Build pt lines using shape file

I have a road network imported in the cube and bus route layer as shapefile.
I am trying to build pt lines from shape file using specified tool.
However, after I create the pt transit lines, I find that due to path algorithm specified in the program, each of the routes is running on multiple road networks.
Is there a different method to overcome this problem or what is the way around this problem.

I am also unable to make PT lines from shapefile. Can you tell me the process till how much you completed the PT lines