Bus Dubai - Abu Dhabi

Dubai and Abu Dhabi are 2 cities which were built not for public transports.
Lately they're doing some improvements to cater he needs for mass transports as the number of vehicles increasing, metro in Dubai,public bus in Abu Dhabi are 2 of them.
Another important thing is how get to Dubai from Abu Dhabi or vice versa in a cheap way.
There are plenty of regular buses running between Abu Dhabi bus terminal (near Al Wahda Mall) and stop in Dubai Al Ghubaiba bus station (in Bur Dubai area).
The buses comes and goes quite fast during interval 30 mins (it will wait till it's full before leaving).
The bus ticket is 15-20 dhs (4-6 USD).
The journey takes 1.5 hours and no stops along the way.
The buses will be available from 6 am - 21:00 pm
Some tips:
- generally women will have no problem entering the bus, but for men - the queue is a nightmare - especially in Dubai bus station (too bad!)
- If you want to go around Dubai in Bur Dubai (old town) area - then you can go around walking from the bus station. But if you plan to visit other part of Dubai - then need to spend quite considerably amount of dirhams as the taxi fare in Dubai is not so cheap.