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====== City Planner ======

Here is an overview of a trainable traffic system, which will be the focus for my research this semester.

===== Elements =====

* **Element_City_Street**
  * Seed element.
  * Has a **Direction**.
  * Reproduces in this direction if no street.
  * Builds sidewalks perpendicular to this direction.
  * Chance to build a City Intersection.

* **Element_City_Intersection**
  * Has a bitfield, representing roads in the 8 directions, assigned randomly upon creation.
  * Creates roads in these given directions.
  * Waits for a vehicle, then moves it the correct direction.

* **Element_City_Sidewalk**
  * Used as a border for buildings.
  * Once enough are created, creates an City Building in the enclosed empty space.
  * Three states:
    * **NO_NEIGHBORING_SIDWALKS**
    * **MOORE_NEIGHBORING_SIDEWALKS**
    * **EW_NEIGHBORING_SIDEWALKS** (Can randomly create buildings)
  * Remembers small number (Queue) of City Vehicles which have passed by. This aides heavily in routing.
    * If the same car runs by this sidewalk twice, some penalty is incurred to aide in routing. This avoids loops.

* **Element_City_Building**
  * Three states:
    * **RESIDENTIAL**
    * **COMMERCIAL**
    * **INDUSTRIAL**
  * Finite size, determined (randomly or fixed)
  * ID number, determined randomly under (randomly or fixed) celing value.
  * If buildings collide and are of different type:
    * INDUSTRIAL + RESIDENTIAL = RESIDENTIAL
    * INDUSTRIAL + COMMERCIAL = COMMERCIAL
    * COMMERCIAL + RESIDENTIAL = COMMERCIAL
  * After established for many AEPS and borders a sidewalk, creates a City Vehicle on the Street with different ID than building.

* **Element_City_Vehicle**
  * Can be either:
    * CAR (low value / high occurrence, any building to any other building)
    * TRUCK (medium value / medium occurrence, INDUSTRIAL to COMMERCIAL)
    * AMBULANCE (high value / low occurrence, COMMERCIAL to RESIDENTIAL)
  * Target building type.
  * ID number. Tries to find corresponding ID in target building, then is consumed.
  * Unique (16 bits?) ID number for routing help.
  * Events alive (16 bits?) If alive longer without finding building, runs out of gas. Else, is scored.
  * If vehicles collide, one jumps over another. This is complicated enough without wrecks. I believe traffic jams will be rare.
  * Upon reaching an intersection, will stop and have the intersection move it to the correct direction.