There is a plan to connect Karjat to CSMT via Panvel in the coming years as it will cut down travel time by at least half an hour
Panvel periphery is going to emerge as the new destination for affordable homes for many prospective buyers. The Union ministry of environment, forest and climate change has given a go-ahead to lay the second railway line on forest land for the doubling of the Karjat-Panvel corridor, which is being executed by Mumbai Railway Vikas Corporation (MRVC).
https://www.freepressjournal.in/mumbai/panvel-to-emerge-as-new-destination-for-affordable-homes-as-ministry-of-environment-gives-clearance-to-corridor-till-karjat
Source: The Free Press Journal