12516 Silchar-Trivandrum SF express, running 2 hrs late,gets held up at Tiruvottriyur for signal clearance, with its usual heavy crowd of migrant labourers from Assam,Bengal and Odisha bound to South. Sleeper coaches had the same crowd as the General coaches. People can be seen standing out of the train as they stretch their muscles in the midst of a long and tiring journey