Dubai Metro is a fully-automated rail tunnel passing below the city of Dubai in the UAE.  Currently, the Red and Green Lines are under construction, with more lines in the planning stages.  The $4.2 billion Metro rail system is on target to open in September 2009, according to the Road Traffic Association (RTA), which is managing the project.

The main part of the system is underground, with elevated viaducts on the outskirts.  Around 7,000 people are working around the clock on the project at different sites across the city.  Once completed, 87 fully automated, driverless, trains will run on the Red and Green Lines, which will comprise over 75 kilometers of track.  Nearly 2 million people will be able to use the Metro when it is completed.