Matchbox Street Puzzle

A racecourse in "Puzzle-Style", which I've designed for my kids for Christmas. The set consists different road parts (straight, curve, intersection, parking, etc.). There's also a petrol station, a police station and a fire station.

The construction of the whole plant should be self-explanatory. I've printed all my parts in PLA, usually at a rate between 30-50mm / s. The road elements should be printed at 100% infill.
The doors can be mounted with a piece of 1mm spring steel.

For road ma