Pedestrians and cyclists in New Edinburgh and Lowertown could be facing lengthy detours as work resumes Tuesday morning on a historic truss bridge connecting the two neighbourhoods.

Starting March 29, crews will resume rehabilitation work on the central and east spans of the Minto Bridge on Union Street.

The renewal work began in July 2015 and the major work on the east span was completed last December, according to the city.

Workers will begin rehabilitating the central span Tuesday, a project that will continue until December 2016, said the city. That will be followed by "site reinstatement" work lasting into the spring of 2017.

As crews work on rehabilitating the central span, they will also put the finishing touches on the east span, the city said.

During the work, the east and west spans will be closed to pedestrians and cyclists.

Vehicular traffic will be detoured onto Sussex Drive and King Edward Avenue via the bridge's west span, with a "minimum of one travel lane" open during the work, said the city.