public List<int> TweeOpt(int routeID, int startListIndex, int endListIndex)
        {
            List<int> bestRoute = Routes[routeID].GetRange(startListIndex+1, (endListIndex - startListIndex));
            Boolean improved = true;

            while (improved)
            {
                improved = false;
                for(int i = 0; i < bestRoute.Count-1; i++)
                {
                    for(int j = i+1; j < bestRoute.Count; j++)
                    {
                        if (j - 1 == 1)
                            continue;
                        List<int> newRoute = OptSwap(bestRoute, i, j);
                        if(CalculateSegmentTime(bestRoute) > CalculateSegmentTime(newRoute))
                        {
                            bestRoute = newRoute;
                            improved = true;
                        }
                    }
                }
            }
            return bestRoute;
        }
        public List<int> OptSwap(List<int> route, int swapIndex1, int swapIndex2)
        {
            List<int> ordered = route.GetRange(0, swapIndex1);
            List<int> reversed = route.GetRange(swapIndex1, (swapIndex2 - swapIndex1)+1);
            reversed.Reverse();
            ordered.AddRange(reversed);
            ordered.AddRange(route.GetRange(swapIndex2 + 1, (route.Count - swapIndex2)-1));

            return ordered;
        }