Some of the trestle supports in the BNSF_Scenic route extend above the tracks. Here is a "quick & dirty" fix for this annoying glitch. Just rename these two files in the SHAPES folder:
1) rename trestle_support.s to trestle_supportX.s
2) rename trestle_support.sd to trestle_supportX.sd

By the way, this can also be done for the TS_StarterRoute.

This is a rather "crude" fix, as it has the effect of removing the supports entirely; however, you may find this more aesthetically pleasing.

Perhaps someone with more knowledge and skill can provide a "proper" fix ...

Regards,
Dan Reid