Factorio Transport Tycoon adds an Exchange Depot system with transport contracts between settlements. Each depot works like a chest, but when opened it also shows a contract info panel with what the settlement offers, what it requests, the route source, reward, and current stock levels.

Exchange Depot provides local electric power around the depot (4-tile range)

The mod creates a simple logistics gameplay loop:

settlements get assigned offer and request items,
contracts are shown visually with icons above the depot,
on left request . on right supply offer
deliveries increase progress and pay rewards/currency