650 miles
About 8 hours
By road, according to mapquest, it is 617.13 miles between Detroit, MI and Trenton, NJ. I would take this as a very approximate number.
Halfway Points
Illinois is approx. halfway between New jersey and Colorado.
The Halfway point between Waretown, New Jersey and Gilbert, Arizona is Hoberg, Missouri.
From Trenton, New Jersey, it is 604 miles to Detroit, Michigan. It would take eleven hours.
New Jersey.
1/2 is the halfway point
The halfway point is New York
Delaire Landing, Pennsylvania is halfway between Jackson & Doylestown
Halfway between New Jersey and Ann Arbor, Michigan, is typically around the area of Toledo, Ohio. This city is a convenient midpoint for travelers coming from either location as it lies along major highways connecting the two states. Depending on your exact starting point in New Jersey, the halfway point could vary slightly, but Toledo generally serves as a good reference.