Old Shanghai Signage – “OWNER DRIVEN CARS ONLY”

The latest in my occasional series of old Shanghai signage (use the search box if you want to see other examples). This sign was captured in a photograph of the general area up around Jessfield Park (Zhongshan Park) in the 1930s. It’s a dirt lot car park (and note the rickshaw puller having a little rest behind the sign) with an “IN” sign but also stipulates for “OWNER DRIVEN CARS ONLY”. I assume this was to stop chauffeurs loitering and taking up spaces?