Road maintenance attends different road categories per shift

[originalfoo]

Would be nice if road maintenance could prefer different categories of road depending on shift:

Shift	S	M	L	H	X
Morning	❌	❌	❌	❌	👍
Day	👍	👍	❌	❌	❌
Evening	❌	❌	👍	👍	❌
Night	❌	❌	👍	👍	❌

This way you don't have residential areas infested with maintenance trucks in the middle of the night.

X = other stuff, eg. parking lot roads or any other weirdness that can't be classified by UI category as Small/Medium/Large/Highway.

As with #228, there could be possibility of different profile for weekday vs. weekend. For example, highway maintenance is more likely at weekend.

[dymanoid]

This is an interesting idea, and it would make the road service much more realistic. In the real world, no one will send a road service vehicle to a highway overloaded by the commuting traffic in the morning (which might happen in the vanilla game, I suppose).

However, this will require a complete rewrite of the service vehicle AI which might lead to a conflict with other mods altering the same AI (like TM:PE, for example).

I would check which changes are required to implement this feature.

The snow plows should probably be dispatched in a different way, however.

[funbaker]

This would also prevent major flapping in income, as there is less income generated at night.

[originalfoo]

See also: https://github.com/dymanoid/CitiesSkylinesModWishList/issues/2