Public radio program Marketplace, in a Monday spot about this summer’s boost in public transit ridership, dropped this nugget in the segment’s lead: “>Last time oil prices were this low it was April Fool’s Day.” True, but diesel’s average for last week, down more than six cents from the previous week, was still a dime or so above the April Fool’s Day average, and on that practical jokester’s minefield of a day, truckers and national media were chasing rumors of an owner-operator shutdown, all of which ultimately culminated in a truckers/motorists convoy on the U.S. Capitol April 28, when the diesel price was $4.17 a gallon. Yesterday’s average was $4.05.

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