Returns the additional delay that would be incurred if the optimal spot
release time of the last aircraft in the target node was calculated
immediately after that of the source node in the optimization.
Returns the additional delay associated with scheduling the current aircraft
according to the All Gaps Force heuristic algorithm for the given edge
in the network.
Returns the additional delay incurred when the optimal spot release
time of the last aircraft of the target node of the edge is calculated
immediately after that of the source node of the edge.