Yes, you would then lose all of your mods to the routes. The merged route that I have uploaded is actually a merge of the two routes with the addition of the Trace Creek Division. I think it's about 75 miles from one end to the other.
Mike, love this route so much that if I can't merge what I have modified in the other two routes I will start with Ashland. Fortunatly I'm retired and since it's cold here in NJ I'll be indoors for awhile. I'm waiting for Shane's answer concerning the size of the routes before I start in on Ashland. Thanks for your efforts.