Schedule is up here - https://www.wera.com/pdfs/eventschedule/roebling071821.pdf and pre entry is open.
Couple of things - the track gates will be open at 3pm tomorrow (Friday). That's it for good news.... For the bad news - anyone who normally takes I-16 to Roebling needs to probably look at another route. A truck slammed into a bridge moving it 6 feet... 16 is shut down from exit 71 to 78 both directions, no ETA on it being opened back up and with the way vacation traffic has been since things opened up on top of the nromal Savannah port traffic it's probably going to be a total mess. Before even heading that way check you favorite mapping/traffic software or site. http://www.511ga.org/#trfc&acon&hin...lon=-82.49121797354331&lat=32.429268740867116 is a good source of info from the DOT.
I-16 detours in Georgia: Best roads to Savannah while interstate is shut down by truck crash (ajc.com)