I have a polyline which is divided into multiparts and these parts are not well ordered so that the vertex's ID are not following the polyline's plotting.

This polyline is a representing a bus line and I need to have the plotting following the driving way of the bus. **I would like to know how to merge the multiparts of this polyline?**

I have already tried to Split and Unsplit, as well as Multipart to Single Part, Union, Merge, etc. but no one is giving me the result I want.