First of all it won't be suitable to tag under Superfast train. It wil never reach peddapalli from tirupati ontime. After this train reached peddapalli the loco reversal won't happen in few minutes. Loco reversal at peddapalli took more than an hour. Even the same case in return direction also. The train will be halted in peddapalli for more than an hour in both the directions. The train is getting affected due to negligence of SCR's lack of maintaining punctuality