this is due to lack of investment in railway infrastructure.UPA govt is also resposible for it because they never try to complete the old projects ,but their ministers announced several new projects.Also due to corruption estimated cost of the several projects doubled/tripled .For example Follwing projects are very important for diversions in case of incidents.
Khandwa Indore is still meter Gauge.
jabalpur balaghat(part of Jabalpur Gondia) is still narrow gauge .Kamal nath ji did nothing to complete this line.
Madhya...
more... pradesh have lowest line density in comparison with other adjoining states.
even tough enough allocation has been made railway ministry in current year budget ,but work is still progressing at a snail speed.