[1] A recent English study estimated that a five percent reduction in travel time could generate five billion U.S. dollars in savings per year. [2]  While no similar research has been commenced in the United States, American urban citizens lost 3.7 billion hours of time and wasted 2.3 billion gallons of fuel sitting in congested streets in 2003. [3]   The approaches to alleviating congestion can be divided into two main schools of thought: 1)… [read post]