It looks like a UAV corridor. At least on the Montreal sectional, see
the information panel in the white portion in the bottom of the
sectional, "SPECIAL MILITARY ACTIVITY: The chart identifies IFR
Military Training Routes and Military Operations Area within which the
Department of Defense conducts periodic operations involving unmanned
aerospace vehicles." (blah blah blah).

Thanks - found it. (Why didn't I see that before?)

Jose
--
Quantum Mechanics is like this: God =does= play dice with the universe,
except there's no God, and there's no dice. And maybe there's no universe.
for Email, make the obvious change in the address.