Green and white lights in the sky in a dark neighborhood.

While driving after stopping at a light, my fiance and I noticed lights in the sky, about a mile away, hovering or moving very slowly in our direction. There was a row of green lights curving out toward us and a row of white ones next to it ending with one red light, about 8-10 on each side. We pulled onto a side street to get a better look but it had just disappeared. It was too dark to see a shape but there was no noise. I thought it was a plane coming to land at a nearby municipal airport (about 3 miles away), but my fiance, a former pilot, said they were not positioned like plane lights.