You can add a request of "near bus stop." Just keep in mind that if your request means the closest rooms are in a Preferred or other bookable room category, you'll need to have the correct category of room booked. For example if you are booked at ASMusic the closest rooms to the bus stop are in the Calypso section, but these are all "Preferred" category rooms so you will not be placed here if you booked a "Standard" room.
Generally-speaking, HA rooms are placed throughout the resorts, in various buildings and floors and may or may not be "near" transportation, elevators, dining, pools, etc. Don't expect a room-request to override a bookable category.