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F



fare box revenue
Value of cash, tickets, tokens and pass receipts given by passengers as payment for rides; excludes charter revenue.
farm-to-market
An identifier for a roadway designated by the Iowa Transportation Commission to be part of the statewide highway system; normally associated as a two-lane roadway in rural areas, but are located in urban areas and can be a four- or six-lane divided roadway.
fatality rate
The number of fatalities per 100 million vehicle-miles traveled.
fatigue
Cause of structural deficiencies, usually due to repetitive loading over time; also refers to tired drivers.
feasibility study
A study about a project's feasibility that is summarized in a document; the study addresses issues, including the project's benefits, costs, effectiveness, alternatives considered, analysis of alternative selections, environmental effects, public opinions and other factors; the feasibility study for major projects involving federal funds was replaced under the Intermodal Surface Transportation Efficiency Act by the Major Investment Study.
federal-aid highway(s)
Those highways eligible for assistance under Title 23 of the United States Code, which does not include those functionally classified as local or rural minor collectors.
federal-aid project
An activity, study, survey, project or other work related to transportation authorized in advance by the Federal Highway Administration, Federal Transit Administration or other federal agency and that is paid for either partially or fully by public funds.
Federal Aviation Administration (FAA)
The government agency responsible for air safety and operation of the air traffic control system, the FAA also administers a program that provides grants from the Airport and Airway Trust Fund for airport development.
federal fiscal year (FFY)
The yearly accounting period for the federal government which begins Oct. 1 and ends on the following Sept. 30; the fiscal year is designated by the calendar year in which it ends (e.g., FY 06 is from Oct. 1, 2005, to Sept. 30, 2006).
finding of no significant impact (FONSI)
Issued at the conclusion of an environmental assessment when the determination has been made that an environmental impact statement is not necessary for a specified project.
fixed cost
An indirect cost that remains relatively constant, irrespective of the level of operational activity.
fixed-route transit
A system of transit vehicles that follows a schedule over one or more prescribed routes.
flagman/flagger
The person assigned to duties at the rear of the train, primarily responsible for applying the breaks; roadway work zone.
flatcar
An open railroad car without sides or a roof.
flextime
Work system allowing alternative work hours to the standard 8 a.m. 5 p.m., with no change in length of shift.
footing
The enlarged, lower portion of a substructure that distributes the structure load either to the earth or to supporting piles; the most common footing is the concrete slab; "footer" is a colloquial term for footing.
formula funds
Funds distributed or apportioned to qualifying recipients on the basis of formulas described in law.
freeway
A divided highway facility having two or more lanes for the exclusive use of traffic in each direction and full control of access; the freeway is the only type of highway intended to provide complete "uninterrupted" flow.
freight intermodal facility
An intercity facility where freight is transferred between two or more modes (e.g., truck to rail, rail to ship, truck to air, etc.).
frontage road
An arterial type roadway that parallels a major transportation facility, such as a freeway; it serves to collect and distribute traffic along the major facility without impeding flow along the freeway; frontage roads are also referred to by the public as "access," "feeder" and "service" roads.
full-diamond interchange
Interchange with a one-way, diagonal-type ramp in each quadrant.
functional roadway classification
The organization of roadways into a hierarchy based on the character of service provided; typical classifications include arterial, local and collection roadways.