SekeRob
The 'only-left-turn' rule is highly questionable here since the painted routing arrows show that both a left and right can be taken (to e.g. reach the fuel station and parking east and north of the shopping center)
Furthermore, to 'only-right-turn' breaks the bus 38 routing which does a left and left again after turning onto the shopping center coming of Via Po. There's neither an exception sign for PSV to do what other vehicles  are supposedly forbidden to do.
Finally the no-u-turn is again, not supported by the arrows painted on road. Both a straight and left turn are allowed.