With the assistance of temporary support, the major microtunnelling work is completed. According to an engineer, the small tunnel rings' concretisation has begun and will probably be finished in three weeks.

The microtunnelling work necessary to construct cross-passage 5B falls inside the influence area of the high-rise located diagonally opposite Hind Inox on Ganesh Chandra Avenue. According to engineers, the base was insufficient for a building with eight stories. Thus, the safety measure. According to officials, the residents of the high-rise will be permitted to return on Wednesday.

In underground Metro lines, cross-passages are little tunnels spaced 250 meters apart that allow passengers to escape from one of the main tunnels in the event of an emergency, such as a fire. Following the subsidence on October 14, 2022, KMRC was forced to remove three of the eight cross-passages that were initially scheduled for the Esplanade-Sealdah stretch.