Hudson River Greenway traffic will be disrupted for the next two weeks to allow for construction work around 59th Street, the Parks Department said today.

Yesterday greenway users were surprised to find the path fenced off from 59th Street to around 63rd Street, with all bike and foot traffic detoured onto a path approximately eight feet wide. A sign on the site seemed to indicate the detour would be in place for two years while Parks works on a capital project, including a playground and bikeway, in Riverside Park South.

As it turns out, construction work that affects the greenway is scheduled to be completed in two weeks, according to the Parks Department. During that time the greenway will be closed from 7 a.m. to 3:30 p.m., with bike traffic rerouted by Parks officers. Yesterday, however, the detour was in effect in the evening, long after 3:30.

“The Riverside South Greenway will not be closed for two years — rather, it will be closed during certain times of day for a period of two weeks, during which time crews will be at work improving 59th Street entrance and the greenway,” said the Parks Department in an emailed statement. “NYC Parks appreciates cyclists’ patience and cooperation during this brief construction project.”

The explanation is better late than never, but the lack of any organized communication before the detour went into effect highlights how the Parks Department repeatedly fails to treat the greenway as the major transportation corridor that it is. We’re talking about the busiest bike route in the U.S., and the agencies that oversee it don’t even give people any advance notice when the path is disrupted.

“There is no question that there must be a safe and comparable alternative route provided to cyclists given that this is the most traveled bike path in the country,” Transportation Alternatives Deputy Director Caroline Samponaro told Streetsblog via email. “Cyclists of all ages and abilities depend on this path for daily commutes and this is a benefit to the city. We wouldn’t shut down a major roadway, for even a day, without clear and adequate detour plans for drivers. In 2016 we need the same standard for bikes.”