We have an existing Activity-Based Model in Cube and we would like to test what would happen if one of the roadway segments is converted to a freeway by removing signals and building interchanges. What are the steps we should follow in the process? Is it sufficient to only change the highway network or does something else also need to be changed, e.g. a node file? Is it necessary to run the whole model to see what happens or can some of the steps in the model be skipped?