How to double your score in Mini Motorways? Los-Angeles 6686 record, high score LA, gameplay

Video was speeded up 2x times, so the original time of a game is 40 minutes

the most important secret:
roads should not intersect between different colors of houses.
each warehouse must have one road leading from the group of houses.
for example:
yellow ordinary warehouse-connected only to 3 houses. And only with them, without intersections.
yellow large warehouse-connected ONLY to its own group of yellow houses.

Видео How to double your score in Mini Motorways? Los-Angeles 6686 record, high score LA, gameplay канала Viktor M