Creating roads with the map editor.
Place the tiles with roads on the map.
After placing the tiles.
choose Option 'Fill in possible road connections'
This will do the Hex Connections based on the Map tiles.
The data for this comes from the 'roadside.txt' file in the MAPEDIT folder.
(If you add new map tiles with road graphics. you might want to update this file.)

Rail lines.
PGX treats all road connections as also indicating Rail lines.
You can add Rail connections with the Map editor.
But, it was intended that the Rail graphics would be placed by engineers during play.
(This was because changing the Map Tiles was inpractical.)
So, if you are creating a new map. It would be better to just put Road hexes on the map.
These indicate pernament transportation lines. Road, and Rail.
(I included the Rail connections anyway, in anticipation of future changes.)

