Short line and Transportation system

Short line noun - A transportation system that operates over relatively short distances.

Transportation system and short line are semantically related. In some cases you can use "Transportation system" instead a noun phrase "Short line".

Transportation system noun - A facility consisting of the means and equipment necessary for the movement of passengers or goods.

Short line and transportation system are semantically related. Sometimes you can replace phrase "Short line" with "Transportation system", this phrases are similar.