Originally Posted by CODC10

CO 1E,

In all fairness, the separation of EWR's parallel 4/22 runways permits what is known as a 'one-and-a-half' operation. This means while one aircraft is beginning either a departure or arrival phase, the aircraft on the other parallel runway has initiated and is approximately halfway through the opposite phase. In other words, given reasonably good weather conditions and enough traffic where the airport needs to be operating at max efficiency, ideally if a DL MD-88 is on short final for 4R, the CO 777 departing on 4L is already rolling towards V1. In theory, simultaneous operations could be held using the layout, but in the event an aircraft arriving at the same time as another is taking off rejects the landing and goes around, there would be a tremendous risk for a collision, especially if departures are executing noise abatement turns or other procedures in the direction of the arriving traffic. Simultaneous takeoffs or landings on both runways would be illegal due to violation of lateral separation minima.