The National Capital Region Transport Corporation (NCRTC) has asked experts from the Central Road Research Institute (CSIR-CRRI) to do an assessment to gauge the impact of the vibration caused by the trains running underground as well as the construction work.

https://www.hindustantimes.com/cities/delhi-news/ncrtc-ropes-in-experts-to-study-impact-of-underground-rail-corridor-on-delhi-zoo-101625611679722.html