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Dallas Area Rapid Transit has been building a light rail system during the last fifteen years. There are parts of this system on the ground, in a tunnel, on top of an embankment, and over bridges. Some of the stations are underground, on the ground, and above the ground. Light rail is better because of the double track which have many crossovers. Therefore, there is more than one trainset operating and in both directions. Monorail has failed to do so. In fact, the above the ground sections of DART appear as a monorail. Double track light rail can be built alongside highways, under transmission lines, under the highways, and above the highways, if not using abandoned railroad lines. In the Garland area, light rail was built alongside a current freight single rail railroad. While two of the light rail tracks are built over major highways, the old freight track still crosses at grade level, and with all three tracks being built inside the old freight tracks right of way. Simply put, light rail is better because it is sustainable over a number of different terrains. For pictures of the different types of DART light rail, and its stations, I highly recommend you search their website at: http://www.dart.org
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