part 1. a refinement of your one-sentence problem statement:-
"A system/process/mechanism to handle waste material generated during travel in public transportation & also simple and convenient unloading of that garbage at desired place."
PART 2.needs of “in-built dustbin” :-
"A system/process/mechanism to handle waste material generated during travel in public transportation & also simple and convenient unloading of that garbage at desired place."
PART 2.needs of “in-built dustbin” :-