Personal Rapid Transit (PRT)?

Personal Rapid Transit or PRT is a relatively new concept that few places have installed.  Morgantown, West Virginia, USA is the only city with operational PRT system.  PRT can be seen as a taxi system on tracks.  Each PRT station has its own track, separate from the main track, so the other PRT vehicles can bypass the station, as shown:

PRT has many benefits over other forms of transport:

• Faster (travels non-stop to destination)
• 100% on-demand service
• Environmentally green
• Safe (Computer controlled)
• Unworthy as a terrorist target

As such, there are ten more systems that are in test, under construction, or being proposed.

There is also one city that has plans for a full PRT system throughout the city.  Masdar City, Abu Dhabi, United Arab Emirates is a future city to be completed in 2014.  By 2009, part of the city was already liveable.  The city is planning to build a full PRT system by 2012 which will replace roads in the city.  The following is a rendering of Masdar City:

Though PRT is relatively new, it seens to by a goof option as some cities like Masdar City has adopted the idea and even banned automobiles for PRT.

As Singapore is a highly populated city, PRT would probably be a good option for Singapore.  Perhaps in 2040, PRT would replace roads in Singapore?