| http://www.w3.org/ns/prov#value | - In one embodiment, message boxes are provided in links (or at devices) to provide text messaging indicating the type of congestion detected, and further, colors or other indicators are used to illustrate graphically the level of congestion detected (e.g., if three levels of congestion are detected such as low, moderate, and high, three colors, such as green, yellow, and red are used to indicate th
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