already trichi-tirupati express running in the form of madurai-tirupati biweekly.it was run till rameswaram when mg line exists.now the officials conducted speed trail and they are planning to increase the speed of trains from 50kmph to 110 kmph.very soon vm-kpd route will get three passenger trains between vm-kpd and pdy-tirupati passenger,pondy-dadar triweekly express,pondy-howrah will also stop at tiruvannamalai,thirukovilur also. wait for an official announcement from railway board. they will announce it shortly