An intersection take off is a take off that starts at a position different than the beginning of a runway. This means that some of the runway will not be available for the take off run. Benefits associated with intersection take offs include:
runway capacity improvement
reduced taxi time
noise alleviation
air pollution reduction
An aircraft may be cleared to depart from a published intersection take off position upon request of the pilot, or if initiated by ATC and accepted by the pilot, provided that all the applicable requirements are met. These may include: