I installed a default scenario called "Overtaking the broken man" from the Steam Workshop which works fine in the default route, but on Ross' modified version presents one with this error message:

Hmmm. So I clicked on the edit button to go to scenario edit and typed in the lat/long location (which turned out to be Hanwel) to see what the AI driver was seeing; this is what I found:

Well no wonder he couldn't find his destination; there's a roadblock (or, to be precise, two of them) in his way! So to see whether or not this was a scenario-specific situation, or a more general route problem, I went into the route editor and went back to Hanwel. Here's what it showed:

Yep, it's a route problem. Now I have a few questions:
1. Do those buffer stops represent an end of a track section, or rather two track sections, placed back-to-back, or
2. Are they simply separate track objects that can be removed?
I've never fiddled with the RW route editor (though I have done editing for years with the MSTS equivalent), so depending on what y'all say those buffer stops are, how would I go about removing them so that the poor driver, who has mouths to feed, can get back to work and get his paycheck per usual?
Many thanks for your thoughts in advance!
Regards,
Dave