We've just started resurfacing the southern runway at night, so we close it at 2230 local.
Bear in mind that we can, and often do, land aircraft on the southern runway if it is quiet outbound, so while you may have landed in a period of the runway inspection, it is also possible that you saw the odd arrival using 09R while 09L was still being used for landing at the same time.
HD, on/off routine inspections were done away with a few years ago. Now we have a sterile runway and two vehicles, each doing one half of the runway. While nobody can argue that it has mitigated poor technique causing conflictions during hte on-off inspections, it also means that many ATCOs now have no idea how long a vehicle takes to vacate the runway when asked.