Roads being a huge factor also plays into socioeconomic factors though, at least in some places. Take New York City for example, where the off-ramps for highways were purposefully planned to let traffic out in larger numbers in impoverished areas to keep the noise and pollution minimal for the more affluent burrows.

Absolutely. Though, do note that, at least in the US, road network locations change slower than gentrification changes a neighborhoods socioeconomics.