The Abu Dhabi bus is my favorite way to get around.
Abu Dhabi’s modern air-conditioned buses operate round-the-clock. The service is easy to use, with passengers hopping in and out of any bus by placing two Dirham coins in the collection box next to the driver. That is approx. .50US. They don’t make change, FYI.
Most bus drivers are friendly and will let you know if their bus goes to your desired locale and when to hop off.