As of today the top 5 longest rail bridges in India are
1. Bogibeel Bridge. Under construction 4.94 km.
2. Ganga bridge at Patna. Completed 4.65 km
3. Vembanad goods bridge. Completed 4.62 km.
4....
more... Munger Ganga Bridge. Completed 3.24 km.
5. Dehri On Sone Bridge. Completed 3.06 km.
6. Ghazipur Bridge. Under construction 2.98 km.
Note:- no 1 is on DMC-DBRG section of NFR. no 6 is on Dildarnagar Jn. - Ghazipur section of ECR. Both are under construction new line projects of IR