Dubai aren't bidding for the 2016 Olympics.

The following cities have submitted bids to become candidates;

Baku (Azerbaijan)
Chicago (USA)
Doha (Qatar)
Madrid (Spain)
Prague (Czech Republic)
Rio de Janeiro (Brazil)
Tokyo (Japan)

Doha will face stiff competition from all of them.

I don't think for a minute that Doha will be awarded the games for numerous reasons, but the transportation issues you mentioned, jackmohan, probably wont be why they'll fail. Remember the 2016 is 9 years away and Doha will probably have changed in many ways by then, included their transportation system. Most Olympic cities put in special provisions for transport during the games. London's normal transport system would not be able to cope with the Olympics, hence why they're building and planning on lots of alternatives in time for the games.

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