Visible point, ME I-95 259...

Checking my shapefiles, the Penobscot/Aroostook line is just about exactly halfway between the two carriageways on Casey Rd, thus it's just about exactly where, theoretically, we'd want the waypoint to be.

In actuality, 45.800133°, -68.427162° will

*probably* fall on one side or the other.

But what if --

*WHAT IF* -- a point falls exactly on the county line?