Just after the long-awaited off-road link from Inwood to Battery Park was completed, Streetsblog got word of a pending Hudson River Greenway detour due to planned work by the Port Authority on the Manhattan tower of the George Washington Bridge.
According to the signage plan [PDF], cyclists and ped traffic will be rerouted to Broadway and Ft. Washington Avenue between 158th and 181st Streets, in Washington Heights. As you can see from the signs, work was scheduled to begin in September. According to a notice from Community Board 12, as of last week the PA was set to get started on November 3, but has since postponed again.
Streetsblog has a message in with the PA to see what the latest projected dates are. Looks like the work is supposed to take anywhere from six to eight weeks.