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Hack The Traffic Lights

Traffic lights are extremely susceptible to being hacked in fiction. This can be done to show off a hacker's (or AI's) power, or for the more pragmatic reason of letting the hacker and his buddies make their escape via car while their pursuers are stuck in the resulting traffic jams. Bonus points if all the lights glow green (or any given colour), as opposed to, you know, the green ones.

Of course, in Real Life Not Everything Is Online — traffic lights aren't hooked into the Internet. This makes this a subtrope of Artistic License - Engineering.

A more dangerous variant is hacking the signals that coordinate train movements, or the warning lights where train tracks and roads intersect.

Examples

Anime and Manga
  • Fujimaru of Bloody Monday did this from his laptop to stop the terrorists from escaping with his kidnapped sister (Chapter 12).
  • Done at the start of the You're Under Arrest! movie as part of a terrorist plot created by an ex-Tokyo Metropolitan Police officer in order to prove his work on how to cause a terror attack on a country with first world standards.
  • The technopath Satsuki Yatoji from X1999 is introduced hacking a street light from her cellphone while riding a bicycle.
  • Ghost in the Shell: Arise: "Ghost Whispers", the hacking of traffic system electronics including the lights are done by rogue JGSDF Ranger soldiers in order to prove that they are serious when they want their imprisoned CO freed of false charges.

Film
  • Older than You Think. This was part of the ploy in the original version of The Italian Job (in 1969!!) by switching the computer's big tape reel with a phony one made by the crew's computer genius, Professor Peach (played by a young Benny Hill!!), they make Turin's traffic system go haywire, creating a massive traffic jam which the gold-heisting crew can then escape in their small and super-maneuverable Mini Coopers.
  • Used again in The Italian Job (2003):
    Lyle: "You'll... never... shut down... the *real*... Napster." [At the traffic control center, the message "YOU'LL NEVER SHUT DOWN THE REAL NAPSTER" appears across all of the video monitor screens. The scene changes to various clips of gridlock across the city]
  • In Live Free or Die Hard, the bad guys are able to shut down traffic and other utilities as part of their master plan.
  • In Superman III, the supercomputer causes the figures in a Walk/Don't Walk sign to animate and fight each other.
  • Used by the titular Hackers to run away from the police and FBI taskforce out to get them.
  • In Ghost in the Machine, one of the Digitized Hacker's attempted murders involves hacking traffic lights to cause accidents.
  • One of the first things we see in The Dungeonmaster note  is the techie protagonist jogging while his computer changes the traffic lights in his favor.
  • Once they are given the Handy Remote Control, the trucker brothers in Think Big try to do this while they rush to their destination before the deadline closes, but it takes a third try before they get it right.
  • In Taxi, rather than hack, the protagonist has multiple copies made of a key that makes a single traffic light go red. His gang uses them to keep ordinary people out of the avenue where they lure the baddies for the big chase scene, reducing the risk of accidents.

Literature
  • In the furry sci-fi novel A Fox Tail Vulpie does this with his phone for fun the day before unleashing a viral AI on the world.

Live Action Television
  • Done near the end of "Marshall Pucci" in the 2010 version of Human Target.
  • In the Agents Of Shield episode "Girl in the Flower Dress", Miles does this to get away from Coulson. It works, temporarily.
  • In an MacGyver episode, Mac "hacks" the stoplights in a town in Europe to help him make his getaway, by putting fragments of a credit card in a timing gear.
  • Lie to Me: the episode "Saved" has an interesting variation of this trope. Cal Lightman finds that a particularly heroic paramedic saves so many lives because she knows where the accidents will be. That's because her brother hacks into traffic lights and purposely causes deadly accidents.
  • In The Blacklist, the kid pretending to be the feared hacker Ivan hacks the streetlamps in his hometown as part of an attempt to impress a girl.
  • One episode of Intelligence has Gabriel use his chip to change the traffic lights to allow him and Riley to catch up to a suspect.

Tabletop Games
  • Champions supplement C.L.O.W.N.. When the founding members of C.L.O.W.N. were just teenagers, one of their "pranks" was to cause all of the stoplights in town to turn green at the same time. The writer of the supplement apparently didn't realize that this would cause cars to crash into each other in the intersections, leading to mass injury and death.
  • The d20 Modern supplement "Urban Arcana" includes a spell which changes red lights to green in the path of the player's vehicle.

Video Games
  • Watch_Dogs: Aiden Pearce is shown to be able to do this. In the E3 demo, he uses this ability to turn all of the lights of a busy intersection to green, causing a massive pileup that kills a few civilians.
  • Mega Man Battle Network: in Colorman.EXE's scenario, he hacks into the traffic lights and causing them to flash many colors, confusing the traffic.
  • Super Solvers: Midnight Rescue features a story about Morty Maxwell using his magic powers to mess around with the traffic lights so they were all the wrong colors and sprouted an umbrella, too.

Western Animation
  • In Spiderman The Animated Series, the Hobgoblin gains access to the Kingpin's computer console, and raves about the information he'll be able to control. The first thing he does is create traffic chaos.
  • In Count Duckula, there was one episode with an intelligent and slightly evil computer, who invites Duckula to play a game about traffic lights. It turns out it controls real traffic lights.
  • In the The Penguins of Madagascar episode, "Go Fish", Kowalski hacks the city's traffic lights in order to stop a fish delivery truck so that the other penguins can steal fish from it. Unfortunately, he accidentally licks one of the wires when he thinks about fish, causing the light to turn green and the fish truck to get away.
  • Teen Titans Go!, "Hey, Pizza!": Beast Boy and Cyborg do this on the tower mainframe in one of their attempts to slow down the pizza delivery man in hopes of getting free pizza. It doesn't work.
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