Well, Jersey has the highest population density of any state in the US, and the whole thing is pretty much just one big network of highways. There are some areas where that's not true, though.
I don't think I've ever even been to the town that borders us to the west, because it's far, and that way is just heading into the pine forest. I'm sure it has some sort of town center, but I've definitely never seen it (and I've lived here my whole life). It would actually take a long while to get there, even though it would be a 55 mph road the whole way.
And to be 100% honest, I just had to look up the name of the town, because I had no clue what it was. I've lived here my whole life, and I had no clue.
The only relevant town near me to the West is like 30-50 minutes away, and it's only relevant because they have a cranberry festival I've been to a few times (the town is pretty much just cranberry bogs, some houses, and a few businesses).
But when you're going North/South, it's pretty much completely developed. Well, when you start at the town south of me, it's completely developed all the way north to NYC/Jersey City/North of that.
South, it gets more sparse for a period (more pines, more marshland, fewer beaches, means less urbanization).
But really, with the exception of the Pine Barrens, NJ is just a big network of towns and highways. There are some country areas where there's more open space for farms, but the actual population of those areas (particularly in the town centers) is quite high. Princeton, NJ is quite dense, for instance, and it essentially borders a fair bit of farmland. We actually have a budding wine industry from Princeton-area vineyards.