diff --git a/aman/sys/aco/Colony.py b/aman/sys/aco/Colony.py
index c881636..6ca7f6e 100644
--- a/aman/sys/aco/Colony.py
+++ b/aman/sys/aco/Colony.py
@@ -120,26 +120,14 @@ class Colony:
             # finalize the sequence
             rwyManager = RunwayManager(self.Configuration)
             for i in range(0, len(bestSequence[1])):
-                self.Result.append(self.Nodes[bestSequence[1][i]].Inbound)
+                self.Result.append(self.Nodes[bestSequence[1][i]])
                 Colony.associateInbound(rwyManager, self.Nodes[bestSequence[1][i]], self.Configuration.EarliestArrivalTime, True)
 
-                # the idea behind the TTL/TTG per waypoint is that the TTL and TTG needs to be achieved in the
-                # first 2/3 of the estimated trackmiles and assign it with a linear function to the waypoints
-
-                # calculate the TTL/TTG for all the waypoints (TTG is positive)
-                reqTimeDelta = abs((self.Result[-1].InitialArrivalTime - self.Result[-1].PlannedArrivalTime).total_seconds())
-                gainTime = self.Result[-1].InitialArrivalTime >= self.Result[-1].PlannedArrivalTime
-                m = -3 * reqTimeDelta / (2 * self.Result[-1].PlannedTrackmiles)
-                timeDelta = 0.0
-
-                for waypoint in self.Result[-1].PlannedArrivalRoute:
-                    waypointDT = m * waypoint.Trackmiles + reqTimeDelta
-                    timeDelta += waypointDT
-                    if timeDelta > reqTimeDelta:
-                        waypointDT -= timeDelta - reqTimeDelta
-                    waypointDT = timedelta(seconds = (waypointDT if False == gainTime else -1.0 * waypointDT))
-                    waypoint.PTA = waypoint.ETA + waypointDT
-
-                    # reached the PTA at the waypoint
-                    if timeDelta >= reqTimeDelta:
-                        break
+                reqTimeDelta = self.Result[-1].Inbound.InitialArrivalTime - self.Result[-1].Inbound.PlannedArrivalTime
+                self.Result[-1].Inbound.PlannedArrivalRoute[0].PTA = self.Result[-1].Inbound.PlannedArrivalRoute[0].ETA - reqTimeDelta
+                for i in range(1, len(self.Result[-1].Inbound.PlannedArrivalRoute)):
+                    prev = self.Result[-1].Inbound.PlannedArrivalRoute[i - 1]
+                    current = self.Result[-1].Inbound.PlannedArrivalRoute[i]
+                    if None == prev.ETA or None == current.ETA:
+                        print(self.Result[-1].Inbound.Callsign + ': ' + prev.Waypoint.Name + ', ' + str(prev.ETA) + '; ' + current.Waypoint.Name + ', ' + current.ETA)
+                    current.PTA = prev.PTA + (current.ETA - prev.ETA)