• IntroductionTraffic light
  • History
  • Vehicular signalsMeanings of signalsGreen arrowsYellow trapVariations
  • Pedestrian signalsAuditory and tactile signals
  • Cycle signals
  • Public transport signalsTransit signals in North AmericaPublic transport signals in EuropePublic transport signals in the Asia-Pacific regionPreemption and priority
  • OperationTiming
  • Variable lane control
  • Waterways and railways
  • Rules
  • DesignBulbsProgrammable visibility signalsSizeMounting and placement
  • Effects
  • Justification
  • In other contextsRacingAs a rating mechanism
  • Gallery
  • In Unicode
  • See also
  • Notes
  • References
  • Citations
  • External links