Ports and Rails

[Xmudder]

I have seen rails going between cities and ports, both in minors and at game start.

Does this work? Can a port act as a railhead to move supplies? Or should there be an actual railhead at the port.

I've been building on the assumption that you need a rail or railhead in any hex with a port or truck station, otherwise you only get 10% of the supplies.

[JagdFlanker]

You only need a rail head at the end of a rail line, everything actually on the rail line is considered to have full rail access. a port can not be a rail head

I'l paste a blurb I wrote a while back, hopefully it explains it somewhat:

dirt roads have a range of 10 road hexes (not 'as the crow flies' hexes) before supply starts to dwindle. 10 road hexes from your *truck station you build a *supply base, and 10 road hexes from the *supply base you build another *truck station, repeat forever
truck station - 10 dirt road hexes - supply base - 10 d-road hexes - truck station

Sealed roads have a range of 15 hexes, so you can either do a truck station every 15 hexes, or:
truck station - 15 sealed road hexes - supply base - 15 s-road hexes - truck station

Railroads have a range of 25 rail hexes, but are much simpler to setup: you only build a *Rail Station at the beginning and a *Rail Head at the end. If the rail is longer than 25 hexes then you have to build another *Rail Station on the 25th rail hex to extend it. You still need *truck stations and roads to distribute supply outside of rail hexes since supply doesn't radiate (much) from rail, otherwise anything actually sitting on the rail is fully supplied.
Examples:
Rail Station - up to 25 rail hexes - Rail Head
Rail Station - 25 rail hexes - Rail Station - up to 25 rail hexes - Rail Head
Rail Head - up to 25 rail hexes - Rail Station - up to 25 rail hexes - Rail Head

[Xmudder]

If that is the case, why does the AI keep building rails between cities and ports?

But thanks, that explains a lot, I was just building a truck station every 12 hexes or so and putting up a city around it (if there wasn't one already there), and also a rail head for when I had the metal to connect them.

[Xmudder]

I wonder if this a simplified AI logistics
issue.