https://www.nysdot.gov/divisions/operating/opdm/local-programs-bureau/repository/bicycle/state-bicycle-routes/rt9-maps-fnorth.html

Fix to nodes-on-same-spot problems for:
osm.org/browse/way/20088610

There are locks north of this island and some sort of water control system to the south.

I added sidewalks to both sides of the Tuncarville Bridge. These are very narrow, but will let bicycles cross the bridge as well.

Some of the route is through areas that have little or no satellite coverage.

Most of the roads seemed to be in the correct place, but I realigned a few to match the GPS track more closely.

There seem to be a lot of missing roads just north of the New York State boarded.
Also there is odd rendering happening. City names are under the roads, etc.

osm.org/?minlon=-74.4033&minlat=44.995&maxlon=-74.256&maxlat=45.0843&box=yes

osm.org/?lat=45.0397&lon=-74.3297&zoom=12&layers=B000FTF

Many of the county boundaries in New York state are closed ways that overlay other closed ways. These should be changed so that they use relations.

There is a hundred year old train trestle across Pudding Creek. In 2007 a mixed foot/cycle path was put a cross the trestle. The Old Haul road is then a path north to MacKerricher. The road is often lost to the ocean from there to the Ten Mile River.