The problem with the grilled car parks is that it is difficult to get a camera between the iron bars using a tripod. For most of them it has to be handheld with the camera resting on a narrow ledge to hold it steady for the longish exposure. That rules out using the 5×7 Cambo monorail. So I am down to using medium format in most cases.
This is the only section of the carpark that would be okay to use a large format camera–there was no grill on the edge of the carpark.