Cities: Skylines

Cities: Skylines

TM:PE 11.9.1.0 STABLE (Traffic Manager: President Edition)
Metallic 24 May, 2021 @ 3:36am
Red light crossing problem
Hey

Anyone having a problem with some cars running red lights? I have one major junction in a suburb and about 20% of the cars ignore the junction timed traffic lights and go right through making everyone else slow down causing congestion.

- Reckless drivers percentage is on 0%
- Individual driving is off
- Advanced vehicle Ai is on
- "Very strict" mode
- In polices (at junctions), everything is off except for "Automatically add traffic lights"

I think I've missed something and a setting is letting them just jump red lights but I can't find it, any help is appreciated :)
Last edited by Metallic; 27 Jun, 2021 @ 6:09pm
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Showing 1-15 of 18 comments
Krzychu1245  [developer] 25 May, 2021 @ 11:41am 
Could you create short clip showing the issue?
Often vehicles ignore traffic light because of how "ability to stop before entering intersection" is calculated. Big part of equation is relation speed to segment length with addition of braking force. If segment is too short or speed limit too high TM:PE may decide to allow entering vehicle to intersection (if impossible to stop vehicle) to prevent situation that vehicle could stop in the middle of a junction.
Metallic 25 May, 2021 @ 6:33pm 
Originally posted by Krzychu1245:
Could you create short clip showing the issue?
Often vehicles ignore traffic light because of how "ability to stop before entering intersection" is calculated. Big part of equation is relation speed to segment length with addition of braking force. If segment is too short or speed limit too high TM:PE may decide to allow entering vehicle to intersection (if impossible to stop vehicle) to prevent situation that vehicle could stop in the middle of a junction.
Will do :)
Sleepy068 29 May, 2021 @ 12:04pm 
Yeah I am getting the exact same issue too, large 12 lane arterial road, 100km speed limit and it is a rather large intersection, so rather big and fast but the cars running reds are almost exclusively one section only. And almost always specific lanes.

I use node controller, so I'll see if maybe that is cause of some conflict or issue (the traffic lights are visible, if you use node controller you can knock the traffic lights out and then they always run it). I'll remove node controller and do some testing. Simulation Accuracy been set to Very High does seem to have more occurrences than Very Low but both seem to be effected.

Definitely a troublesome issue but hopefully we can find a solution.

Edit: No such luck, removing node controller had no effect, good to rule it out though.
The odd part is some vehicles stop just fine but others just fly on through, sometimes the same lane stops or goes.
Last edited by Sleepy068; 29 May, 2021 @ 12:07pm
Krzychu1245  [developer] 29 May, 2021 @ 12:36pm 
Add some screenshots, will be easier to say what can be wrong ;)
Sleepy068 29 May, 2021 @ 12:58pm 
If anything helps absolutely! I have noticed the issue since the latest Content DLCs, Trains and Bridges (might have happened before), I have noticed with those DLCs some old bugs have crept back into the game, at least for me (evacuation stopping all public transport and warehouses outside industry cost more). Since this issue has cropped up recently too, might be related to the latest game patch and not so much TPME (Hopefully, although I'd imagine you guys are faster at fixing issues haha).

Image of red light running:
https://i.imgur.com/YFHcwiL.jpg

2nd Image of intersection with some notes:
https://i.imgur.com/qqcfW9Q.jpg

Image of intersection working as intended:
https://i.imgur.com/Va9Sp7J.jpg

Road is an asset and not stock, 100km/h limit on the main stretch.

Is there a log of anything I can get to you that might help?
Absolutely amazing mod by the way, had it since the original, game is a mess without it haha.
Krzychu1245  [developer] 29 May, 2021 @ 1:02pm 
how long is the segment directly connected to that intersection (screenshot)?
Sleepy068 29 May, 2021 @ 1:09pm 
44 Cells but sorry I'm an idiot, I should of checked this first, disabled TPME and it is still happening, so it cannot be TPME's fault, I think this might be another bug that has crept back in.
Krzychu1245  [developer] 29 May, 2021 @ 1:18pm 
if it happens without TMPE it means that segment is too short to the speed limit of road. For 100km segment needs to be pretty long and even a lot longer for trains (they have much worse brakes xD )
Sleepy068 29 May, 2021 @ 1:25pm 
Haha without TPME the speed limit is only 60km/h, and without it, a lot more cars run the red light causing complete chaos in the intersection. 60km/h should be enough for them to stop so I'll weigh it up as a stock issue and report it to paradox, for now, I might need to redo the intersection or shift it down a bit, it is the only one with issues so it doesn't seem very common, just bad luck it is the busiest intersection.
Sleepy068 29 May, 2021 @ 1:48pm 
@Metallic so you know bud, i used node controller to tweak the intersection and the road leading into the intersection. It has significantly reduced the number of red lights getting run and now the intersection is working much better (still getting the odd car but at least 70-80% less than before).
Definitely grab that mod if you want, it may save you having to redo the intersection.
I just angled the intersection and increased it's size behind it by editing between the traffic lights and the step behind where the cars kept running the lights.
https://i.imgur.com/jAHr1Ky.jpg
https://i.imgur.com/MXMgaDK.jpg

Hope that helps!
Metallic 29 May, 2021 @ 9:55pm 
Ay,

sorry for no response, I don't know what but it just seems the issue just phased away, I'll come back if I see it again
ping1000 11 Jun, 2021 @ 10:59am 
I do experience that issue as well.

example of cars treating traffic lights as mere suggestion:
https://www.youtube.com/watch?v=rQu-WIcOPsA

example of cars totally ignoring lights:
https://www.youtube.com/watch?v=ukt1FBtmnyU
Nyx 24 Jun, 2021 @ 2:20pm 
Originally posted by Krzychu1245:
if it happens without TMPE it means that segment is too short to the speed limit of road. For 100km segment needs to be pretty long and even a lot longer for trains (they have much worse brakes xD )

Thank You!!!! I was having this issue and lowering the speed limit on the road fixed the issue, they started stopping now lol!
Misused chair 27 Jun, 2021 @ 2:03pm 
yeah even at insanely low speeds and with very long segments traffic ignores traffic lights a lot
Krzychu1245  [developer] 27 Jun, 2021 @ 4:08pm 
Maybe share a screenshot or short clip showing the issue?
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