At least 18 cars were damaged by the hole near the parkway's interchange with the New Jersey Turnpike, The Star-Ledger of Newark reported. Fifteen had to be towed, officials said.
The hole in the far-right lane of the southbound side was about 4 feet wide and 6 feet long with a depth of several feet. Parkway officials were unsure if it was caused by a collapsed pipe or bad weather.
Workers struggled to complete temporary repairs before the evening rush hour. But by 4 p.m., traffic was backed up about 5 miles on the parkway.
The jams spilled over to the turnpike.