I had a somewhat difficult time coming to the conclusion that the side street in the foreground is Allen Street. That area is completely different from my years as a regular visitor to downtown Trenton. I do know that the Colonial Restaurant was in the 200 block of North Broad Street. Perhaps a fellow Trenton contemporary will verify the name of the street I recognize as Allen.
That is Feeder St the next block north of Allen St. The train tracks ran along Feeder. Allen St had a trolley track in it which went into the Trenton Transit Terminal.