The sally port is the garage where police and sheriff vehicles unload inmates at the jail. They may include new arrests or the transportation of inmates to the Tremont Annex Facility or other jails.
After the vehicle pulls in, the door is closed creating a secure environment for those in custody. They are removed from the vehicle and proceed to the booking area for processing.
There is also a sally port for the transporting of inmates in and out of the annex facility.