MUMBAI: The city's monorail project, a 19.5 km line, which is being done in two phases, Chembur-Wadala and Wadala-Jacob Circle, is likely to be delayed by four to five months.

Reliable sources said that the Phase I of the project, which was to be ready by December 2010, would now be ready by May 2011 and Phase II by December 2011.