The original DOS Transport Tycoon Deluxe came with five basic demo tutorials, which gave the player a very basic understand of how the game actually worked.

Open TTD has a myriad of new features and improvements over the original, but it plays pretty much the same. These videos should still apply (though with a few differences, read this guide below). And you get to view a little of the game's history. :)

If you want a more comprehensive understanding of how to play Open TTD with more up-to-date tutorials, there's an online manual:

https://wiki.openttd.org/en/Manual/

And an online tutorial:

https://wiki.openttd.org/en/Manual/Tutorial/

And also the guide by Master Hellish:

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2443694410

Video:
https://www.youtube.com/watch?v=PTUfMoHhs2U

Covered also in the online wiki:

https://wiki.openttd.org/en/Manual/Tutorial/Buses

You can also make one-way roads for extra traffic management, try playing with the road construction menu.

Regarding vehicle orders: (applies to all modes of transport) OpenTTD handles them better - You don't have to issue orders to every individual vehicle. You can clone a vehicle in the depot after issuing orders to it, and it will have the same orders as its original.

Additionally, you can build a new vehicle in the depot, and in the "Vehicle Orders" screen, click the "Go To" button on a vehicle which is already out on its rounds, and its order list will be copied to your new vehicle.

https://youtu.be/OUCDjlC6ANw

Covered also in the online wiki:

https://wiki.openttd.org/en/Manual/Tutorial/Trains

https://youtu.be/_6Sv9UJK3HQ

Also covered by the wiki: https://wiki.openttd.org/en/Manual/Tutorial/Planes

Towns have noise limits (depending on settings and town size) - By default, there'll be a limit to how many airports can be placed around a town.

https://youtu.be/eubC1CgFj08

Boat to nowhere!

Boats are very basic, but have been improved in Open TTD with the addition of canals, locks which allow boats to traverse slopes, buoys to help with navigation (place them between docks and add them to boat orders to stop boats getting lost), and aqueducts (Canals can be built across bridges to get from one side of a hill to another).

Also covered in the wiki:

Buoys: https://wiki.openttd.org/en/Manual/Building%20buoys

Canals and locks: https://wiki.openttd.org/en/Manual/Building%20canals

https://youtu.be/rsxvoN7JLgo

Covered more in-depth on the wiki:
https://wiki.openttd.org/en/Manual/Tutorial/Two%20Tracks

Basic Network:
https://wiki.openttd.org/en/Manual/Tutorial/Basic%20Network

Trains are the primary focus of Transport Tycoon, and you can build much more complex rail layouts than shown here. Open TTD has much better signal management over the original game - Trains actually can queue at stations now instead of looping in a circle forever.

Wiki info on signals: https://wiki.openttd.org/en/Manual/Building%20signals

* To modify the terrain in OpenTTD, Landscaping is a separate toolbar:



* The game world view cannot be rotated, due to limitations of the original game, and backwards compatibility - But the transparency options should make things easier to see what you're doing. You can make trees transparent - Or actually, anything in the game can be made transparent! The button below each option in the Transparency Menu toggles between making everything shadows, or completely invisible:



NOTE: Destroying invisible trees around towns may have unintended consequences (depending on settings)! If your reputation drops too low, you won't be able to build stations in those towns.

* To increase the size of the Graphical User Interface (has to be applied before starting a new game), it may help to get the "OpenGFX + Big GUI" mod from the in-game Online Content menu:

1) Open the online content menu:



2) Search for "OpenGFX + Big GUI" in the filter box:



3) Enter the "NewGRF" settings from the main menu:



Add the "OpenGFX + Big GUI" NewGRF (mod) to the "Active" list, then press Apply.



Note that it won't increase the size of everything, but most things.

(More hints maybe coming up when I think of them)