It opens at 7(ish?) in the am, and closes at 6 in the pm. (Although, at daylight savings changes, they can take a week or so to recalibrate it.)
If heading out of the city, if you get stuck with a closed gate, there's a button you can press to get out. If heading into the city, there's no button and the sensor is not calibrated for anything as small as a bike (even a cargobike) to trigger.
It is private property, although the majority of road users entering seem to ignore that.