there is a connection between Abu Dhabi airport and Dubai/Sharjah/Al Ain. There is even a free bus service for Etihad passengers. Check the following link. Hope this...
By car you have a trip of about 1 1/2 hours of smooth road. You want to get on Emirates Road #66 (also known as the Al Ain Road).... once on the road, there's no way to go wrong. After crossing over...