b. Intersecting Runway Separation
Separate leaving aircraft from an aircraft using an intersecting runway or nonintersecting runway
when the flight paths intersect. Do this by ensuring that the departure does not begin takeoff roll until
one of the following conditions exists:
(1) The preceding aircraft has left and passed the intersection, has crossed the departure runway,
or is turning to avert any conflict (Figures 2-17 and 2-18).
Figure 2-17. Departure separation (intersecting)
(2) A preceding arriving aircraft has taxied off the landing runway, has completed the landing
roll, and will hold short of the intersection; has passed the intersection; or has crossed over the departure
runway (Figures 2-19 and 2-20).
c. Anticipating Separation
Takeoff clearance need not be withheld until prescribed separation exists if there is a reasonable
assurance it will exist when the aircraft starts takeoff roll.
d. Wake Turbulence Application
(1) Separate a small aircraft taking off from an intersection on the same runway (same or
opposite direction takeoff) behind a preceding leaving large aircraft. Ensure that the small aircraft does
not start takeoff roll until at least three minutes after the large aircraft has taken off. Inform a pilot when
you must have him hold in order to provide the required three-minute interval (Figure 2-21).