
Yes, I-280 is actually a spur of I-80, not a loop. But because I-280 and I-80 both end at I-95, this can technically count as a "loop" of I-80.
The road is also known as the Essex Freeway.
The beginning of I-280 at I-80.
No. I-80 does not begin here. I-280 WB merges onto I-80 WB. New signs corrected this with MERGE TO I-80 WB.
Eisenhower Parkway (Essex CR 609) is an important connector for trucks to bypass Livingston. But that's southbound. Northbound is a dead end that goes nowhere, although it should have reached West Caldwell.
Different styles of CR shields. The older has a blue shield with a yellow background, the other is just a cutout blue shield.
I-280 descends down the Watchung Mountains in a rock cut.

ESSEX County.
I-280 makes another descent.
Parkway Parkway. How repetitive.
Exit 13 was supposed to lead to NJ 75, a connector freeway between I-280 and I-78 in the west of Newark. NJ 75 was never built, but this ramp was. I-280 EB is required to shift lanes because the through route turns into a giant ramp that deposits into Newark, while the "ramp" that is I-280 EB connects to the former NJ 58 mainline. This is one of the reasons why after the Garden State Parkway and the Oranges, I-280 is always woefully congested.
I-280 along the former NJ 58 mainline in Newark. Same lane widths.
This is why I-80 is the more advisable route to NYC. I-280 has a movable bridge, the Stickel Bridge. This bridge requires 24-hour notice to raise and is rarely raised. There were plans to replace this bridge with a high-level crossing, but that would make the NJ 21 interchange even more complicated and require major acquisition of right-of-way in dense urban areas.
I-280 ends at the New Jersey Turnpike Western Spur, I-95.
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