yodarocks1 / traffic-simulator

Traffic

The plot, when run, simulates traffic. The colors represent the number of vehicles on the road (albeit with no respect to the length of the road segment), as a percentage of the maximum-count road segment.

Hover events

Roads

Hover over roads to see their weights (the time in minutes it takes to travel across the node when no traffic is present)

Intersections

Hover over intersections to see their latitude/longitude, and the number of vehicles currently queueing at that intersection. They also show an icon representing their type (🚦: Traffic Light, 🛑: Stop Sign, ◯: Roundabout )

Stop signs will also show which sides have stop signs. EW indicates that North-South traffic is free-flowing, while East-West traffic must stop. NS similarly indicates that East-West traffic is free-flowing, while North-South traffic must stop.

Generators

Hover over generators to see how much traffic is generated from that direction at that intersection.

Logic

Roads

Road weight increases depending on how many cars are on it following the equation: $w=(cars + 20) / 26.25$

Intersections

🛑 Stop Signs (All-way)

Stop signs allow one car from one direction every 2 seconds, plus all cars that do not collide with it.

For example, if it's the North-bound traffic's turn, then the first North-bound car can go.

If it turns left, then the East-bound car can go if it is turning right, the South-bound car can go if it is turning left, and the West-bound car can go if it is turning right.

If it goes straight, then the East-bound car can go if it is turning right, the South-bound car can go if it is going straight (if the East-bound car didn't turn right) or turning right, and the West-bound car cannot go.

Etcetera.

Stop sign logic

Scenario 1: Left turn

Allowed:
 - EB right
 - SB left
 - WB right
    ✓    ✓
    ↓ SB ↑
@←←   ↘  ╰←←←✓
 EB  ↖   ↘ WB
✓→→→╮  ↖   →→✓
    ↓ NB ↑
    ✓    @

Scenario 2: Straight

Allowed:
 - SB right
 - EB right
 OR
 - SB straight
    ✓    @            ✓    @    
    ↓ SB ↑            ↓ SB ↑    
✓←←←╯    ↑  ←X     ←  ↓    ↑  ←X
 EB      ↑ WB      EB ↓    ↑ WB 
✓→→→╮    ↑  →X    X→  ↓    ↑  → 
    ↓ NB ↑            ↓ NB ↑    
    ✓    @            ✓    @    

Scenario 3: Right

3a: EB right
Allowed:
 - SB right
 - WB right
 OR
 - WB straight
                      X
    ↓ SB ↑            ↓ SB ↑        
 ←←←╯    ╰←←←      ←←←←←←←←←←←←     
 EB        WB      EB        WB     
#→→→╮    ╭→→→@    #→→→╮    ╭→→→@    
    ↓ NB ↑            ↓ NB ↑        
    #    @            #    @        

3b: EB left
Allowed:
 - SB right
 - WB left
    ✓    #
    ↓ SB ↑
✓←←←╯  ↗    ←✓
 EB  ↗  ↙  WB
#→→   ↙  ╭→→→@
    ↓ NB ↑
    ✓    @

🛑 Stop Signs (Tributary)

Stop signs can allow one car from tributaries every 2 seconds, while all cars from the primary roads continue through.

Cars are only allowed to continue through the intersection if they take an action that is not going to collide with present through-traffic.

🚦 Traffic Lights

Traffic lights have phases that can contain the following parts for each direction: left turns, right turns, straights, and left yields. Right yields are always assumed to be on. No phase can contain phase parts that collide with one another.

These phases are rotated through by the active PhaseController.

◯ Roundabouts

Roundabouts let one car through from each direction every 2 seconds.

Generators

Generators generate, on average (using a normal distribution), the given number of cars per minute.

Vehicles' destinations may be any intersection. Each intersection has a weight, increasing the odds of being selected as a destination.

Run Options

python w/ env

• Open a Windows Command Prompt
  • Yes...it unfortunately has to be Windows, unless you want to make your own env that matches what I used
• Run env\Scripts\activate
• Run python app.py
• Open localhost:8050

Visual Studio

• Open Traffic.sln
• Press Start Without Debugging (or use Ctrl+F5)
• Open localhost:8050