Airports could not be connected with routes in version 1.5, so version 1.6 should fix that issue.

Did a lot of testing and discovered the Modding API is extremely limited when it comes to updating roads in save games. Even with CommonAPI it seems impossible. Thankfully, there are workarounds!

If you already have a save game made in FREE GAME mode, that did not have "Hide AI Cars 1.5" enabled when you created that game, you can still get it working, but there are some manual steps involved.

MANUAL STEPS TO GET IT WORKING:

1. Load the save game and add "Hide AI Cars 1.5" to the list of mods.

2. After the save game loads in, you will need to use the Road upgrade tool, and go around the map looking for cars. I recommend starting in the towns, selecting the Upgrade road tool, and selecting another road OF THE SAME SIZE AS THE ROADS YOU WISH TO REMOVE CARS FROM.

ie. In my towns I have modern medium width roads, so I replace them with medium country dirt roads with the upgrade tool. Then I select the modern medium width road type from the roads panel, and upgrade the medium country dirt roads back to the modern medium road type. (ie. what they were originally).

3. Repeat step #2 for each road segment containing cars. You should see the cars disappear if they are on the road segment you are upgrading when you upgrade it. I know this is a pain to go through each road with a car on it, but there's no alternative I know of -- and the only thing I haven't tried is documenting the Transport Fever save game format!

4. Once finished, save your game WITH A DIFFERENT FILENAME just in case we discover any bugs with this mod in the near future.

Any issues, please let me know.

This version checks to see if a street already has the transportModesStreet variable set, and if not, assigns a transportModesStreet of { "TRUCK", "BUS" } by default. This seems to have fixed the crashing to desktop that was caused when "TRAM", "ELECTRIC_TRAM" were assigned to streets automatically.

INITIAL EXPERIMENTAL RELEASE - Do not use with important save games!