India, June 1 -- The ambitious overhauling of Mumbai's local trains under the Mumbai Urban Transport Project (MUTP) has hit a speedbreaker. Not only has the cost of procuring 238 air-conditioned rakes and setting up new train maintenance facilities jumped by Rs.4,500 crore but the opening of global e-tenders has also been delayed from June 2 to August 3.

According to sources, the cost of production and supply of the latest version of AC locals has gone up by around Rs.3,700 crore while maintenance facilities at Vangaon on Western Railway (WR) and Bhivpuri on Central Railway (CR) account for another Rs.800-crore hike.

Last year, the railway ministry cleared the procurement of the 238 AC locals but there have been procedural delays. WR an...