Nice work!
Thanks!
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Something I had wanted to add to the previous post, but didn't find enough time to do:
The year is now 1940. The network is more or less at its final extent, as it covers all the towns in this strangely rectangular country. As a bonus, here is a map of the signal systems at work in Pinewell and sorroundings. Red is track circuit block signalling, white is mechanical with light signals, black is mechanical with semaphores. Grey and dark blue are the same, just for narrow gauge.

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Now for the interesting part! As we all know, countries are usually not just big cities connected by rail. In this weirdly box shaped country there are plenty of villages scattered around. Most were not lucky enough to get a train station, but until recently there were no means of fast inter-city transport by road. But now there are plenty of buses to choose from! This has led to an explosion in bus routes together with an explosion in bus passengers - almost 1.5 times as many as train passengers (also counting city buses). The network growth has been such that you can get almost anywhere without taking a single train! Most of the lines are served twice per hour (i.e. 12 times per month) compared to once per hour for most train services - this is mostly to provide the necessary capacity, not to provide frequent departures. Some busy lines are served up to five times per hour. There is even a short stretch of narrow gauge line that has been bussified already!
Individual lines are not shown on the map, rather bus connections are shown as a whole.
The map shows clearly where the concentration of people is, which is mostly on the Pinewell - Appingbury axis and a bit further south. This is also reflected in the frequent overcrowding of the Express train Pinewell - Appingbury.
The colours have changed as follows: Red is for express trains, Orange is for stopping trains, Brown/Maroon is for electric and suburban trains, Yellow is for narrow gauge
Blue is for ship lines, thin blue is for air lines, and thin black is for the bus network

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I'm not leaving without a few aerial pictures courtesy of our own aircraft (they are bored flying mostly empty...)
First off is Pinewell, the metropolis of more than 10,000 people - not counting satellite cities

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Here is Appingborough, the only city with three railway terminals! The terminal to the east connects to Malliwell and Pinewell, the southern terminal to Appinglock and Mallimouth while the western terminal is for the narrow gauge line. Appingbury itself has 6000 inhabitants.

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Speaking of buses, some cities have become hubs in the network where passengers change in many different directions. Some cases are more extreme than others - as an example is Heppwell with 850 inhabitants but almost 1400 departed passengers per month in the bus terminal. Six bus bays accommodate routes in five directions, taking up a big chunk of the city. Find it on the map southeast of Ashchester.

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EDIT:
Forgot to add a save link, download from here:
https://drive.google.com/open?id=13XTOST0GJ-ZpLehT87yVohTsJGUQ3fB7You will need
Simutrans Extended 120.2.1 nightly build 14.5 #93490b5 (or newer, I imagine) since that is what I use.
Pak128.Britain-Ex 0.9.3No add-ons