Traffic light simulator

Project: Traffic light simulator
Featured:	No
State	Planned
Members	Xopr
GitHub	No GitHub project defined. Add your project here.
Description	School example of implementing traffic lights
Picture

Some brain dump on charlieplexing 8(x3) traffic lights, 4(x2) pedestrian lights, 8 sensors. each number is a pin

        | 36  63     |
      45|            |
      67|            |
        |            |
      16|            |16  12
      72|            |72  34
--------'            '--------

                            37

51                          73

15

--------.            .--------
  45  16|            |16
  67  72|            |72
        |            |
        |            |12
        |            |34
        |     25  52 |

Main traffic lights use a Z-shape connection so that with 90 degrees turn, all combinations are used (bottom right: 1↔2↔3↔4)

light	top	right	left	bottom
Green.A	6→7	1→3	7→5	2→1
Orange.A	7→6	3→1	5→7	1→2
Red.A	6→5	1→4	7→4	2→3
Orange.B	5→6	4→1	4→7	3→2
Red.B	5→4	4→2	4→6	3→4
Green.B	4→5	2→4	6→4	4→3

Pedestrian light uses L-shaped pinout so that opposing lights carry the same signal. All 4 will draw a square so to speak, if placed on the intersection (bottom right: 6↔2↔7). One color will follow the L shape, i.e. red is clockwise, green is counter-clockwise around the intersection 'square'.

Arrow indicates red light, polarity reversed will make it green.

light	top	left	right	bottom
Red	1→6	7→1	6→2	2→7
Green	6→1	7→1	2→6	7→2

Remaining connections: 3→5 and 5→3, can be used for different layouts

Normal traffic lamp diameter is 210mm, small (bicycle) light is 80mm, big light is 300mm.

Die-cast metal cars are between 1:68 and 1:58 scale; assuming 1:64 scale

• LED 3mm (3.8mm) h=5.3+0.8mm) would be 192mm(243mm) × 422mm
• LED 5mm (5.8mm) h=8.7+1mm) would be 320mm(371mm) × 621mm

According to an article on 3 March 2016, yellow light times are increased to:

• @80km/h → 5s
• @70km/h → 4.5s
• @50km/h → 3.5s

Some Traffic light brands:

• Futura
• Imtech BV (formerly (Groenpol) Peek) (Dutch standaard(?))
• Alustar
• Econolite (American vintage signals)
• VIALIS Nederland Haarlem 'Classic'
• Stoye

Some traffic automation brands:

• Ko Hartog Verkeerstechniek B.V.
• Siemens Nederland NV
• Swarco Nederland BV
• VIALIS

Straight intersection: arrange left, straight + right Uneven intersection: arrange left + straight, right