Complex sentence: Currently it is the only highway in the United States designated as Interstate 795, while their have been several proposed highways to be signed with the designation none have received the designation (a proposed highway in Florida has been tentativly selected to receive the designation).
Split into simpler sentences: Currently it is the only highway in the United States designated as Interstate 795. While there have been several proposed highways to be signed with the designation, none have received the designation (a proposed highway in Florida has been tentativly selected to receive the designation).