Apparently the bridge is now operational and has been returned to a "closed" position allowing vehicles to cross onto and off the island.
RIOC's newest advisory as of 11:00 am - "Special Roosevelt Island Bridge Advisory":
"The NYCDOT has affected repair and operation of the Roosevelt Island Bridge, and the RI Tram has resumed normal operation schedule. "
So the question is with constant opening and closings due to the UN how many more outages can we expect? Probably a few more unless they have figured out what caused these last two.