Yes, NIT Agartala is one of the safest colleges in India. The whole campus is highly secured and the campus is residential not only for the students but faculties too. You will find guards roaming around the campus making you feel safe all the time.
The security and care offered to girls is unmatchable. They are required to enter the hostel gate within 6.30 pm and they are expected to keep their whereabouts known. The campus does not tolerate ragging in my form and the seniors are extremely sweet.
NIT Agartala is one of the safest colleges so you can put your worries to rest.