The fund, with demands that currently far outstrip revenues allotted to it from federal gasoline taxes, has a projected shortfall of more than $15 billion per year, Secretary Foxx said at a newsmaker breakfast hosted by The Christian Science Monitor.
Transportation Department letters to each state outlined the funding cuts that would start Aug. 1, when the highway fund will be too depleted to cover all approved projects.
http://www.csmonitor.com/USA/Politics/monitor_breakfast/2014/0701/Transportation-chief-US-set-to-ration-highway-repair-funds-as-of-Aug.-1