... is this or that feature supported ? ...
Yes, everything mentioned is supported. I couldn't possible do screen shots of everything. See below for details.
... changing sprites over time ...
wallyweb has opened a can of worms ... now, we know how to access the current date, when a game is started or resumed. I hate those undocumented features. Yes, you can have sprites changing over time; e.g. our drive through bus stops could be without diamonds in earlier years and have them added in later years. For starters I have implemented these as pre/post 1950 (see pic below).
Such a changeover will only happen if you reload a saved game. At that time the date can be checked and the relevant sprites loaded. I would say, a player will not play a game in one session anyway; therefore, when a game is reloaded and the time is right different sprites can be shown.
If anyone wants roads and related features change over time get your pencils sharpened, or would that be the mouse pointer.
... US Roads Set v0.86 ...
Meet the new US Roads Set v0.86. It's not the final update yet; but we need you to test it in the various situations it is going to be used. Once the Canadian Trains Set v0.3 will be released, there will be a further update. This will then make the 2 sets compatible as far as the road/rail bridges are concerned.
There will also be a DOS-version a little bit later.
What does it do ?
It's a comprehensive road system replacement set, that is not just for the US/Canadian market. It is equally at home anywhere in the world.
It caters for left and right traffic side and all normal climates; i.e. Temperate, Arctic and Sub-tropical.
As far as rail crossings are concerned, it caters for all standard rail track systems; i.e. normal, electrified, monorail and maglev. In addition it is compatible with NGRails (narrow gauge track system) and Pikka's Viaduct Bridge (pb_viaduct.grf).
It is not just for TTDPatch, It is also fully compatible with OpenTTD.
What is new ?
Almost all sprites had a face lift in one way or another; there were also a lot of sprites missing, like left traffic side, icons and cursors.
The bus and truck stations have been reworked fully by lifeblood.
The drive through bus and truck stops by Oz have also be included, but sadly only for OpenTTD players.
The set was recoded from scratch and made fully compatible for OpenTTD, NGRails and Pikka's Viaduct Bridge.
What do you need to know ?
If you are using any of the following sets : Canadian Trains Set (v0.2g), NGRails (v0.92) or pb_viaduct with the US Roads Set then the following is the required sequence of your entries in newgrf.cfg or openttd.cfg (or NewGRF settings) :
1)pb_viaduct.grf
2)NGRails[w].grf [rail track system to replace]
3)CanSet[w].grf
4)USRoads[w].grf
As with the previous set, the first (and only) parameter (if specified) will not replace the bridges. 0 (default) = bridges are replaced, any other value bridges are not replaced.
Known issues :
Currently the CanSet v0.2g needs to be placed before the USRoads[w].grf in the newgrf.cfg, otherwise you'll get incorrect narrow gauge rail crossings. This will be fixed with CanSet v0.3.
The current version of Pikka's Viaduct bridge does not correctly identify the status of the US Roads Set and does not support left traffic side for the viaduct ramps with US Roads. These problems have been fixed (updated version is attached below).
@Pikkabird – I've changed the cond-type in sprite 51 from 06 to 09 and added the sprites for left traffic side. Maybe you can update your set.
Happy testing and report any issues here.