Read this: New York City also has an extensive web of expressways and parkways, which link the city's boroughs to each other as well as to northern New Jersey, Westchester County, Long Island, and southwestern Connecticut through various bridges and tunnels. Because these highways serve millions of outer borough and suburban residents who commute into Manhattan, it is quite common for motorists to be stranded for hours in traffic jams that are a daily occurrence, particularly during rush hour.

What part of New Jersey can be reached from New York by taking the expressway?
What is the answer? (If it cannot be answered, return "unanswerable")
northern