cars driving extremely slow?

[HentaiHamster]

all my cars are driving slow. idk whats goin on....setting all the speeds using tpme seems to make them switch back to normal speeds but any road i place automatically has slow speeds even if it is default setting of like 50

[MaxFX]

Hmm, this is the second thread I see about this. So far no idea what's causing it, or better, how it's solved.

Other thread: https://steamcommunity.com/app/255710/discussions/0/3187988018486469354/

[Renpona]

Are you using the Network Extensions 3 mod? The mod included hidden code that would secretly decrease all speed limits to very low values for certain players, as well as deliberately cause bugs for people using certain other mods.

[LegoProfessor]

Hi
Does the cars drove slow from the beginng on or after a while?
In my city, after some time playing the game and/or doing some "refinement" suddly the speed drops and the vehicles creep along.
Restart the game and the are on normal speed until ...

[vincenthius]

I've just started experiencing this on my current save. I thought it was due to upgrading a dirt road at first and the speed being bugged from that old road, but now I am getting it when I lay any new road. Using TMPE I see the speed is indeed higher than the vehicles are moving, and when I apply that same speed to the road the vehicles then move at expected pace, however it seems all roads are defaulting to a near crawl when I lay any new roads.

[mistermcd]

tl;dr

I have same issue of slow vehicles, not using Chaos mods, have found a workable workaround, a possible culprit, but can't solve/find a for sure root cause, so just use a workaround that essentially solves the issue for me - on 3 different cities having the same problem....Read on for more!

I have/had the same problem. I must have a problematic asset or a buggy mod or something, because I have been playing for a few years, have lots of mods, have 3 big cities. OVer time, the cities would just start going REALLY slow. Vehicles and people moving really slow, and CPU usage would be almost 2x as when game runs smoothly.

I have a Ryzen 9 5900x, 64GB, and started a brand new city on Feb 27th, with Airport DLC. I used unlimited $ to build a nice airport, game was running well. Then I started building the main city and then about a week or so into building, the slowness started.

I was like OH NO! This is the same thing that happened with the last 2 cities (that I spent a LOT of time on) so have been trying to figure out what mod or asset slows me down.

So I started hunting...

In TMPE Options, Maintenance, there is a button "Reset stuck cims and vehicles".

When I hit that, the CPU usage drops in half, and the city comes back to life, planes zipping like they are planes, trains railing around like bullets, and cars driving around like they are supposed to be....this reprieve lasts for me, depending on the city, for a few minutes at most.

When I look at the TMPE logs, it shows resetting stuck cim (no path) for many thousands of cims. I have no idea where they are getting stuck, but obviously I reach a threshold and they get stuck with no path, and the game slows down bigtime.

So as a work around, I have used the mod More Shortcuts to create a hotkey to the Reset Stuck Cims and Vehicles button, and then a windows program called Macromaker to press my hotkey every 2 minutes. When the hotkey is pressed, the screen border flashes red as though the game was on pause, but only briefly, and the menu click sound is heard. (if in full screen, only hear the click). But, when that click is heard, I have a happy city and if it starts to slow down before the macro kicks in, I can hit the hotkey to reset.

So, not a solution, I haven't figured out root cause. I have 3 saves I can share with anyone who is up for a challenge. Will need MOM, More Path Units, More Citizen Units, TMPE, Remove Need Pipes/Electric at barest to get them to load. I have over 7500 hrs in game so consider myself experienced with it...but not enough to solve this problem :(

PS - not sure if this is related, I have have keep a version history of my saves (up to city-2022-5t (started at 1a)) and found something very interesting. For version 1a-1g of my city, I was building the airport (one of the new Airport DLC included maps) and then 1h I started building roads. The toggle it mod lets you turn off buildings, and I noticed something underground (one of the buildings left a hole so you could see under ground when toggle it toggles off buildings (neat feature btw)).

In the exact center of the map. Dig a large hole about 30 units diameter all the way down. so I could get closer to what I saw. It is a what looks like a Bloody Penguin tram road stop (the overhead glass type) with people pouring out of it. From far away, (outside the hole), there is something else down there covering the people, but getting closer, that something else disappears - it almost looks like a squashed Opera House....These people move, even when the game is on pause. Is it Cim Hell? I am not even sure if this related to the slowness problem, and the versions of my city that don't have them down there only have the airport and a small industry area, nothing on that portion of the map where the underdwellers reside....I can't delete them or move them or touch them....

So, I guess this is a long answer to Yes, I have the same issue, I have worked around it, I haven't solved it, I may have found a red herring at the middle of the map, but I am happily playing it with an auto-click reset stuck cims and vehicles every 2 minutes.

McD

[AoD_lexandro]

If you use Move It! mod and don't properly align a building the cims get stuck inside it and cant leave, causing massive backlogs that drop the game speed to a crawl. Happens a lot with harbours when shifted around, hangers over custom airport stands are also another culprit.

Basically any time you clip an object with another one, the pathing gets broken.

Look for buildings not sending out any vehicles, cims not exiting airplane stands, harbours not sending out ships properly etc etc.

[Clunk]

Originally posted by mistermcd:

In the exact center of the map. Dig a large hole about 30 units diameter all the way down.

That makes me think if this ..
https://steamcommunity.com/app/255710/discussions/0/3193618785993079440/

[kenpthree]

A bit late to the conversation but I found something that worked for me. Cars moving very slow cyclist actually moving faster than cars. I tried deleting half the city with no luck then ran broken node detector and it came back with 2 short sections or disconnected ped paths. fixed those and everything sped up instantly.

[a_umlaut]

Originally posted by kenpthree:

I tried deleting half the city with no luck then ran broken node detector and it came back with 2 short sections or disconnected ped paths. fixed those and everything sped up instantly.

This worked for me too. Still not sure if it's some mod that causes the issue, but running a scan with Broken Node Detector fixed it for me.

[snowflitzer]

if you have a pedestrian zone marked over a road and the road is 50 km/h, it is slowed downed because of the zone!

[krose1980]

My issue with super slow traffic was STUCK CITIZENS. I checked and repaired that with Broken Node Detector mod. I had 6000 stuck citizens, after clearing down to 2000 speed got back to normal.