Is it a cost-effective way to save land by building highways?

Cost will be inevitably incurred when a highway is built. Saving land I part of strategic development of a country. Hence, the benefits brought by the highway outweighs the cost. However, it must be noted that building highway is not necessarily effective in land saving because the main function is to diversify transport to solve problems such as congestion. Land saving is this thus only a side effect and not very effectively achieved through building highway.