Let me elaborate on this instead of just being snarky.
I want to connect every city on the largest map together on the outside by a single rail line running people movers. The interior of the map I want to connect every town together via roads from a centralized goods depot like Walmart.
Even if it required multiple sources of Oil for example instead of just one in order to get the limit much higher than 400 that would be fine. A limit of 400 is limiting the way I want to play the game.