Class IntersectionController

constructor

• new IntersectionController(
      id: string,
      laneKeys: string[],
      cfgGetter: () => SimConfig,
  ): IntersectionController

  Create a new intersection signal controller.

  Parameters

  • id: string

    junction ID

  • laneKeys: string[]

    distinct entry-group keys this intersection serves

  • cfgGetter: () => SimConfig

    accessor for the current simulation config

  Returns IntersectionController

id

canNewVehicleEnter

• canNewVehicleEnter(laneKey: string): boolean

  Optional helper: if you want vehicles to be allowed on AMBER (some sims do), keep using isGreen() for strict behaviour. If you want "treat AMBER as proceed if already close", handle that in VehicleManager.

  Parameters

  • laneKey: string

    string key identifying a specific lane

  Returns boolean

  true if the entry is permitted

getCurrentGreen

• getCurrentGreen(): string | null

  Return the lane key of the currently-green approach, or null if none.

  Returns string | null

  the currently-green lane key, or null if none

getLightColour

• getLightColour(laneKey: string): LightColour

  Returns the UK-style light colour state for a given approach laneKey. Use this to drive ThickLine colours:

  • RED -> setRed()
  • RED_AMBER -> setRedAmber()
  • GREEN -> setGreen()
  • AMBER -> setAmber()

  Parameters

  • laneKey: string

    string key identifying a specific lane

  Returns LightColour

  the signal colour string

getState

• getState(): "RED_AMBER" | "GREEN" | "AMBER" | "ALL_RED"

  Return the current signal phase.

  Returns "RED_AMBER" | "GREEN" | "AMBER" | "ALL_RED"

  a human-readable state summary

isGreen

• isGreen(laneKey: string): boolean

  True only during GREEN phase for the currently-served approach.

  Parameters

  • laneKey: string

    string key identifying a specific lane

  Returns boolean

  true when no vehicles are circulating

update

• update(dt: number): void

  Advance the signal timer by dt seconds and transition states as needed.

  Parameters

  • dt: number

    time delta in seconds since last frame

  Returns void