Main Page | See live article | Alphabetical index New Jersey State Highway 175 is a state highway in New Jersey, United States. It is Sanhican Drive in Trenton, New Jersey and River Road, West Upper Ferry Road, and Upper River Road in Ewing Township, New Jersey. This highway is an old routing of New Jersey State Highway 29 and in fact is an old frontage road for NJ 29. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.