Based on data from six separate studies, the costs to retime a traffic signal range from $2,500 to $3,100 per intersection per update.(2004 - 2006)
The cost of retiming traffic signals in the Washington, DC area is about $3,500 per intersection.(April 2004)
System to support the Washington Metropolitan Area Transit Authority multi-agency electronic fare payment card cost approximately $25.5 million.(February 2004)
District of Columbia