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> We can be glad we have cars, trucks and roads that are a bit more resistant to attacks. Hack traffic light controls and set them to all-green (assuming the s

> We can be glad we have cars, trucks and roads that are a bit more resistant to attacks. Hack traffic light controls and set them to all-green (assuming the safety interlock is done in software), all-red, or just off. Dumbass drivers will do the rest for free. Alternatively, disrupt Google Maps and Waze. Barely anyone has a dedicated offline navigation system any more - take these two out or "suggest" fake traffic jams to overload side streets [1] will also cause a lot of chaos. [1] https://www.theguardian.com/technology/2020/feb/03/berlin-artist-uses-99-phones-trick-google-maps-traffic-jam-alert https://www.theguardian.com/technology/2020/feb/03/berlin-ar...

Animats 2y ago
> assuming the safety interlock is done in software It's not. There's a conflict monitor unit that is completely separate from the signal controller. It has direct inputs from all green or other permissive lights, and a diode matrix that determines which combinations are allowed.[1] If it detects a conflict, all signals go to flashing yellow. "This monitor uses a standardized programming card for channel compatibility (permissives), minimum flash time, per channel Minimum Yellow Change Disable, CVM latch, and 24 volt monitor latch. Programming of this card is accomplished through the use of soldered wire jumpers. The programming card plugs into the monitor through a slot in the front panel." All 4-way intersections use the same interlocking pattern, so there's a standard card that covers most cases. Only unusual intersections need a custom programming card soldered up. [1] https://www.editraffic.com/wp-content/uploads/2019/10/MMU2-1600G-Operation-Manual-889-3819-00-.pdf https://www.editraffic.com/wp-content/uploads/2019/10/MMU2-1...
Talanes 2y ago
>Hack traffic light controls and set them to all-green (assuming the safety interlock is done in software), all-red, or just off. Dumbass drivers will do the rest for free. Have you never driven during a blackout? People get a little awkward figuring out four way stop priority, but it's not pure chaos.
- mschuster91 2y ago
  > Have you never driven during a blackout? People get a little awkward figuring out four way stop priority, but it's not pure chaos. Maybe I'm biased but I've seen incredibly dumb shit happening in urban areas (Munich in winter to be precise). People forget how to drive when lights go out and street markings are covered by snow. Rural drivers in contrast have zero problems because they're used to driving without constant guidance.

Animats 2y ago

> assuming the safety interlock is done in software It's not. There's a conflict monitor unit that is completely separate from the signal controller. It has direct inputs from all green or other permissive lights, and a diode matrix that determines which combinations are allowed.[1] If it detects a conflict, all signals go to flashing yellow. "This monitor uses a standardized programming card for channel compatibility (permissives), minimum flash time, per channel Minimum Yellow Change Disable, CVM latch, and 24 volt monitor latch. Programming of this card is accomplished through the use of soldered wire jumpers. The programming card plugs into the monitor through a slot in the front panel." All 4-way intersections use the same interlocking pattern, so there's a standard card that covers most cases. Only unusual intersections need a custom programming card soldered up. [1] https://www.editraffic.com/wp-content/uploads/2019/10/MMU2-1600G-Operation-Manual-889-3819-00-.pdf https://www.editraffic.com/wp-content/uploads/2019/10/MMU2-1...

Talanes 2y ago

>Hack traffic light controls and set them to all-green (assuming the safety interlock is done in software), all-red, or just off. Dumbass drivers will do the rest for free. Have you never driven during a blackout? People get a little awkward figuring out four way stop priority, but it's not pure chaos.

mschuster91 2y ago
> Have you never driven during a blackout? People get a little awkward figuring out four way stop priority, but it's not pure chaos. Maybe I'm biased but I've seen incredibly dumb shit happening in urban areas (Munich in winter to be precise). People forget how to drive when lights go out and street markings are covered by snow. Rural drivers in contrast have zero problems because they're used to driving without constant guidance.