Maruthamalai timings and bus availability?

Hi. We are planning to go to Maruthamalai on March 2 Sunday. But we are not sure of the timings and transportation options availability. Have heard some recent changes in the transportation and also they aren’t Allowing cars. Can someone please let me know the details , if you have visited very recently. Thank you. EDIT : I mean buses from Adivaram. Internal transportation options from Adivaram. Sorry I wasn’t clear earlier.