British thermal unit (Btu): The amount of energy required to
raise the temperature of 1 pound of water 1 degree Fahrenheit
(F) at or near 39.2 degrees F and 1 atmosphere of pressure.
Certificated airport: An airport holding an operating
certificate issued by the Federal Aviation Administration in
accordance with Code of Federal Regulation (CFR) Title 14,
Chapter 1, Part 139 allowing it to serve scheduled or
unscheduled air carrier aircraft designed for more than 30
passengers. Commuter rail: Urban passenger train service for
short-distance travel between a central city and adjacent
suburb. Does not include rapid rail transit or light rail
transit service. Container: A box-like device used to store,
protect, and handle a number of packages or items as a unit of
transit that can be interchanged between trucks, trains, and
ships without rehandling the contents. Controlled right-of-way:
Lanes restricted for at least a portion of the day for use by
transit vehicles and other high occupancy vehicles (HOVs).
Demand