I know this is an old thread . . .
I stumbled upon this looking for something else. I had a set of these that made a subdivsion worth of Levittown style houses; and a big paper mat with grey or black for roads and green for lawns. And yes, it did seem to go with Matchbox cars (Hot Wheels were still in the future). But "there's the rub"; "HO scale" slot cars and similar vehicles are 1:64 - which is S scale in model railroading. Why the enduring popularity of Matchbox and Hot Wheels didn't cause somebody (like Tyco if not Mattel) do "jump in head-first" into a line of toy-quality S scale train sets I don't understand. Or maybe they did.