Seems reasonable to me. I cut the simple bushes in front of my house back from the path much much more often than the township does anything with the road.
Manpower wise, the bushes along the path probably take as much average labor as the road.
Maybe material/gas to resurface the road every 10 years would make the road cost more per year.
There is a bike trail near our house, and the plowing and mowing and tree clearing along it takes way more man-hours than the once-a-decade resurfacing.
Not sure what the comparative costs are, and a road would have similar maintenance if it was that close to trees (a bike path is just a narrow road).
Manpower wise, the bushes along the path probably take as much average labor as the road.
Maybe material/gas to resurface the road every 10 years would make the road cost more per year.