> installing the bollards that should have been there all along.

A bit of an aside... Please dont default to “install more bollards!” thinking. Bollards are incredibly dangerous, where I live a cyclist is paralyzed/killed by bollards every few years. Theyre also completely ineffective against two wheeled (and small 3-4 wheel) power vehicles. As I recall the ADA compliant spacing is now 6’ between bollards. Not very effective against small cars even!

The FHWA says “bollards should never be a default treatment, and should not be used unless there is a documented history of intrusion by unauthorized cars.” https://www.fhwa.dot.gov/environment/recreational_trails/gui...

Other landscaping features, such as medians or chicans, are both more effective and safer at restricting trail access.