1. Determine the distance between Newark, NJ, and Altoona, PA, along I-80:
- Newark, NJ, to Altoona, PA: Approximately 223 miles (359 kilometers)
2. Calculate the halfway point by dividing the total distance by 2:
- Halfway point distance = 223 miles / 2 = 111.5 miles
3. Locate the city closest to the halfway point of 111.5 miles along I-80:
- Hazleton, PA, is approximately 110 miles from Newark, NJ.
Therefore, the halfway mark from Newark, NJ, to Altoona, PA, on Interstate 80 is near Hazleton, Pennsylvania.