In FIG. 14, the process 1400 can also constructs a turn-straight-turn transition correction for the S-turn impermissible flight condition. For example, a point on the first waypoint (WPT₁) inbound course is selected such that when a line is extended from that point at a predetermined departure angle from the inbound course, the intercept point on the second waypoint (WPT₂) outbound course is approximately the same distance to the second waypoint (WPT₂) as the departure point is on its inbound course to the first waypoint (WPT₁). Course-capture maneuvers can be utilized to transition from the inbound course to the straight section and to intercept the second waypoint (WPT₂) outbound course. The beginning of first turn (ITP₁) and the target point on the second waypoint (WPT₂) outbound course are found by geodetic projection from the respective waypoints using an offset distance. If the construction of the bypass result in a trajectory that does not cross the way-line between the waypoints, the distance from the waypoints can be reduced to ensure that the aircraft 100 passes between the waypoints on the S-turn bypass.

The process 1400 can be enhanced by utilizing different distances for the inbound and outbound turn points. The inbound and outbound distances from the waypoints are determined such that the straight segment intersects at (or near) the midpoint of the way-line between the first waypoint (WPT₁) and the second waypoint (WPT₂). The flight path of the transition is reduced and the course departure and intercept angles are within a particular range. The flight path is aesthetically acceptable to flight crews and the straight segment is equal to (or greater than) the roll-anticipation-distance for the second turn in the transition.