It is very difficult to monitor and check in railways especially when a train usually carries about 800 or more passengers. There are issues of stoppages, intermediate passengers, people boarding and getting out...controlling & monitoring is impossible. Maharashtra CM has one again requested for special trains for migrants. If they approve for one state , will get requests for other states as well. At this juncture looks difficult to immediately start. One option could be services like Shatabdi, Rajdhani which have lesser stops and only carry reserved passengers. But if you start one, it will create pressure /protests to start others as well. As of now looks highly unlikely to start train services even after May 3