At present, there is no separate category for parking slots for the differently abled persons.
However, I find that to be a promising idea. You can suggest that in the idea exchange.
As @C_T kindly suggested (the reply would be accepted as Solution in this current post, should it have correct information on the subject as well as further steps to be taken), I have also checked and relocated your idea to another thread with similar direction, should there be added further opinion.