The phrase "transporting to and fro" can be replaced by several synonyms that convey the same meaning. For instance, you can use the term "shuttling" which implies the movement of people or objects back and forth. Another synonym is "commuting" which refers to regular travel between two places, such as from home to work or school. "Conveying" is another word that describes the act of transporting something from one place to another. "Transferring" is another synonym that means moving something or someone from one place to another as well. These synonyms can be used interchangeably depending on the context and desired tone of the sentence.