Why are there multiple routes? They are interfering with my anticipated route.

**Describe our question or idea**
I created a custom routes (_xml_) file that includes a single route which I want the ego vehicle to follow. However, with the debug flag, I learned that there are multiple routes (for e.g. are highway exits) also deployed in the simulation. Initially, the vehicle follows the path from my _xml_ file; but, when it approaches one of the exits, it takes the exit route. I am not sure why the other routes are being deployed by default. I do not want that.

**Expected behavior**
The ego vehicle should exclusively follow my route specified in the _xml_ file.

**Screenshots**

**Desktop (please complete the following information):**
- OS: Windows 10
- CARLA Version 0.9.13
- Python version 3.7
- Version 0.9.13
- Town 04

Reproduce the behavior with the custom XML route, the debug flag, CARLA 0.9.13, and Town 04 to confirm where the additional routes appear. Done means the ego vehicle follows only the route specified in the XML and does not select an exit route; the issue names no source file or test, so locating the route-deployment entry point is part of the investigation.

Written by the indexing model from the issue text.