Diamond Knowledge Base

All 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Word	Description
IMSA	The International Municipal Signal Association.
Inductance	That property of an electric circuit or of two neighboring circuits whereby an electromotive force is generated in one circuits whereby an electromotive force is generated in one circuit by change of current in itself of in the other. The ratio of the electromotive force to the rate of change of the current. Measure in the micro Henries (uh).
Inductive Reactance	The reactance (ohms) of an ideal (loos less) inductor is the product of the voltage across the inductor and the sine of the phase angle (90 degrees) between inductor voltage and current divided by the inductor current assuming sinusoidal operation.
Infrared Detector	A detector that senses radiation in the infrared spectrum (NEMA). A detector installed over the roadway capable of being actuated by the passage of a vehicle through its field of emitted electromagnetic waves.
Initial Portion	The first timed portion actuated controller unit including fixed, computed, maximum, minimum and added.
Interval	The part of parts of the cycle during which signal indications do not change.
IRI	International Roughness Index
ISTEA	Intermodal Surface Transportation Efficiency Act (1991)
ITE (ITE)	The Institute of Transportation Engineers.