First off this roads idea doesn't directly fit into a "will increase tax revenue" bracket, I see it as the basic building block required for a lot of other things to work. I'll be using Aetius's map as a basis for this, if this is seen as a good idea I'll also be posting a complete table of every region with the tax income available from each one.
Roads:
- Viae terrenae (dirt road/basic) - 250+25(modifier) Denarii to construct, Upkeep of 25 DPT.
- Viae glareae (gravel road/simple) - 500+50(modifier) Denarii to construct, Upkeep of 50 DPT.
- Viae publicae (paved road/standard) - 750+75(modifier) Denarii to construct, Upkeep of 75 DPT.
- Viae militares (highway/advanced) - 1,000+100(modifier) Denarii to Construct, Upkeep of 100 DPT.
All of these figures are preliminary and subject to revision. At present values for us to maintain advanced roads in every controlled region would be a total expenditure of 6,200.
The income generated by roads is determined by what region the road is in based on the P/A/R scale and what regions with roads surround it. This will not apply to regions seperated by bodies of water nor will it apply to regions with roads that Rome does not currently control. The "connected to it" is determined by the map, not by where history says roads were, if it does share a border with the intended region then you don't get the bonus.
- Viae terrenae (dirt road/basic) - 5/10/15 DPT, Generates 5 DPT for each region with level 1 roads connected to it.
- Viae glareae (gravel road/simple) - 10/20/30 DPT, Generates 10 DPT for each region with level 2 roads connected to it.
- Viae publicae (paved road/standard) - 15/30/45 DPT, Generates 15 DPT for each region with level 3 roads connected to it.
- Viae militares (highway/advanced) - 20/40/60 DPT, Generates 20 DPT for each region with level 4 roads connected to it.
In order to generate their full extra income the regions connected must have similar roads, for instance lets look at Sicilia as a simple example.
Region - Wealth - Road level - DPT from roads - Total DPT for region
I - R - 3 - 55 - 1305
II - R - 2 - 40 - 1290
Despite having a level 3 road in I, II only has a level 2, thus I only gets a level 2 bonus and II only receives a level 2 bonus.
I'm sure at this point most of you are either already responding, based on the esteemed principles of tl;dr, or wondering what this could mean for income when fully developed, so lets look at a region shall we? For the sake of argument we'll for somewhere that will generate a LOT of extra income with roads, that Rome currently controls. Macedonia.
Region - Wealth - Road level - DPT from roads - total DPT for region (wealth+roads)
I - R - 4 - 140 - 1390
II - A - 4 - 120 - 645
III - A - 4 - 120 - 645
IV - A - 4 - 120 - 645
V - A - 4 - 120 - 645
As you can see, as long as everywhere in that region is developed as one, all the roads within it pay for itself, barely. Which is the intention, roads aren't meant to be some sort of gamebreaking income generator and I think they'll work best if instead of generating a great deal of income by themselves they generate extra income for other public buildings and investments etc.
You may also be thinking "by comparison to their basic income the roads add a great deal to poor regions and very little extra to rich regions" and you're right. It only makes sense that the rich regions are rich because they already have some sort of complex road and trade system, the game just doesn't recognise it yet, I'm trying to maintain some sort of balance with what should be rich and what shouldn't without negating the effectiveness of roads.
You might also be thinking "but some of regions ave like seven regions connecting to it! Won't that be overpowered!", yes a bit but they generate so much extra income because they're so central.
Road building itself is a two turn process, per every level of road. So to upgrade a single region from no roads to Viae militares will take 8 turns, assuming the spending bill passes each turn. Based on my idea that roads will add a certain amount of income to various other investments I also think it is fair enough to assume that private individuals can, if they want, commission the roads themselves to benefit an investment they make or to generate populist points, but then they have to eat the Upkeep without reaping the direct benefits to income.
Roads can only be constructed in regions that Rome controls, the region also must have been controlled by Rome for at least one full turn before Surveying can occur (I'll get to that in a second).
Surveying - Before any road can be build a dice roll needs to be made, and money needs to be spent. You, the individual wishing to propose a road be built, need to survey the area the turn beforehand, this will cost 1000 per region surveyed. I'm thinking for other buildings a similar policy should be enacted, only the person who paid for the Survey can propose a bill for the construction of roads in that region and no region can be Surveyed twice in one turn or on the turn immediately following the Surveying. What this effectively means is that you can obstruct the construction of roads, or any other building which might use this mechanic, in a region for a turn. Obviously some sort of counter balance will need to be set up, spy's etc., and I think the senate should also be able to change how much each region costs to Survey. That is if this mechanic gets accepted.
This is where the dice roll modifier, as mentioned in the cost, comes into it. A single diceroll can serve multiple regions and in that case the "number of regions" statistic is determined by how many of those regions included in the roll have roads, which means you can make the cost far more attractive to the senate by investing a great deal in Surveying. For that to affect the cost all of the regions you intend to survey must be included in the bill, and you may not use regions with level 4 roads. Rolls can also be done separately.
Availability of materials (d20) - Number of regions with roads connected to it
So lets say that I want to construct four level 1 roads in Italia, this of course assumes that we haven't given certain regions pre-existing roads from the get go, in the regions I/II/V/VI. Given that nowhere has any roads at this point the senate has to eat the full modified cost of 750 per region.
You can propose the bill in the same turn you survey if you wish, that is entirely up to you, but you still can't survey that same area for more advanced roads the next turn.
What do you think? Did I miss anything? Have any question?













