Those mentioned road types are about as rarely needed as the walking trail so moving those away from the normal road type selection buttons would be reasonable, there's no sense to keep those there. Maybe make submenu of those + Walking trail to that part of Unify Action Area?

This would have 2 benefits, it saves a little more of that limited space on left panel and also it helps to prevent accidental clicks which change road type and may go unnoticed when editor hits Save.