After our family did their two-week quarantine in Dubai as tourists, we were able to cross the border into Abu Dhabi. This required another Covid PCR test with negative results. In this instance we did not have to endure both nasal cavities being swabbed, but just one. Prices for the test vary, so shop around before committing to your existing health provider.
The lines were long at the checkpoint and we had to produce our passport showing when we arrived in the UAE. Also, we needed our Covid results. I do not know what would have happened if our results were positive. Requirements seem to keep changing based on the number of cases. It is possible they would have turned us around and made us go back to Dubai or let us go to our villa in Abu Dhabi to start the fourteen-day quarantine process all over again. Fortunately, the border crossing went smoothly for us at the check point.
Interestingly enough, at the checkpoint only two passengers and a driver are allowed per car. Our family of four had to be in separate cars to cross. In Abu Dhabi itself, we can be in the same car together. However, we must all wear masks in the car, or risk being stopped by police and fined. A single driver does not need to wear a mask while driving.
Within six days of our PCR test to cross the border another test had to be administered, or a five thousand AED fine per person would be assessed on our residency visa (1,361.30 United States Dollars). At this time there are four of us who were facing this requirement.
Keep in mind this is the state of things only at this moment. Requirements are in flux. Yet as is always the case in the UAE, one must certainly adhere to the rules or face being deported and/or fined. This is how the UAE effectively controls their borders.