Regular flooding of pavement and doorway behind bus stop

The pavement sinks towards the doorway of 690 Dumbarton Road and creates a huge pavement flooding whenever it rains (so, rather most of the time),making it unsafe and unhygienic for passers-by and even worse for residents at that address, who cannot access their door without standing ankle deep (please consider that unfortunately, some people at the bus stop late at night pee in that doorway too, because dignity doesn't bother them - so fixing the puddling would at least make it slightly less bad ). Thank you for your help.