changing lanes

[funhave]

If I have two 2 lane streets goes into a 4 lane street, the cars, wich come from the right side or left side, change 2 or 3 lanes and produces a jam

is there a mod to change the traffic goes flowly

 

[ristosal]

Cars crossing over multiple lanes at once usually means there's not enough time and space for them to make a more staggered lane change. It's hard to tell what exactly is the problem without seeing a screenshot of it, but try giving them more room to navigate.

 

[funhave]

so is there a mod wich I can change the time, where the cars move the street and how much lanes they move and wich type of cars are allowed on wich lane:

Trucks on right side, only for passing other trucks change lanes, and so on

 

[ristosal]

Traffic Manager: President Edition has a lane connector tool, not sure about restricting trucks on certain lanes only though.

 

[funhave]

Wich point is that? I didnt find such a point, that why I ask or is that "fehicle restrictions" - yes I think so is restrictions
I can only define wich cars are forbidden on wich road, but I cannot define the main road for vehicles, wich they schould mainly use but NOT forbidden to use other lines at the same time

 

[TrolKabu]

You're pointing on the tricky side of the traffic engine of the game. Your best bet is the Traffic Manager, as Ristosal told you, but it won't solve exactly your problem, you'll just be able to limit the worst behaviors of the vehicles.

The behavior of vehicles is almost entirely dictated by (didn't try the last DLC, but I would be surprised if it has changed) :
- their destination, including every intersection to calculate a predefined path
- the time they will require to reach this destination. The shortest distance is not always the fastest, it can serve you well for dedicated ring road or shortcut. But they don't take into account the traffic jam at all

Now, for each intersection a vehicle has to use, the traffic engine will set their path to the closest line of the exit by default. Thus, to turn left, the path will be on the left line of the road. But if the vehicle entered this very road on the right line, they'll need a certain distance to be able to change to the left line. And if this distance is too short it could cause a jam. It's likely what's happening to you, as Ristosal pointed out.

You have several solutions :
- increase the distance between the two 2-lanes roads merge and the next intersection to give time to the vehicles to change their lanes in a smoother manner.
- use a dedicated road (quite impossible in a city) to by-pass the merge, for each of the opposed road
- if the vehicle flow is composed of several types of vehicles, try to use a dedicated road for some of them that don't pass through this intersection, to diminish the overall flow, and get rid of the jam (by using the Traffic Manager)
- forbid one or the other way in the intersection, with one-way roads for examples. This would likely diminish the jam by making less vehicles line changing on this distance. Obviously, you'll need another intersection further for them to reach their destination.

Anyway, post one or two screenshots to show the overall situation and one to show precisely what's happening between the merge and the intersection. It will greatly help us to try to solve your problem with the Traffic Manager or the vanilla engine.

Also, you cannot set the "main road" for any vehicle. It's allowed or not, but nothing else.

 

[MotownCountry]

Traffic Manager: President Edition has a lane connector tool, not sure about restricting trucks on certain lanes only though.

yes...they also do vehicle restriction. i use it sometimes.

 

[funhave]

First picutre: Why vehicles change the lane on the left side and i have 3-4 lanes straight?
Second picutre: Why they go first on the right side and then change the lanes on the seconde

Third picture: why they use the accel lane and not the direct linie to the 3 why Highway?Most of them waiting vehicles goes straight and not to the ground highway

 

[ristosal]

First and second: What I see is pretty normal in terms of how the highway AI works in this game. The right side lane is mainly for short distances, leaving and merging, while the others are for long distance travelling. All cars travel at the same speed and there's no overtaking, so this behavior is used to avoid congestion at highway interchanges. One of the merges is still a bit weird in the second picture.

Third: Good question. Hard to tell without knowing where that lane ends up

 

[TrolKabu]

1- Probably, their destination will make them turn left at the next intersection, so they go to the leftmost lane. The Traffic Manager permits you to look at the destination of every vehicle that use a road (for each lane), if you want to ensure their path.

2- I would guess that there is another road reduction (how should I call this in proper english ? ) further that makes them take the rightmost lane that doesn't get suppressed by the successive reductions. A picture further on this road would be better, if it's not this

3- Very probably, it's the shortest path. Acceleration lanes & highway have the same speed limit, so the shortest is the best, since they don't take jam into consideration. It's easily avoidable :
- Destroy the little portion of accel-lane between the two entrances (around the first orange truck in the queue).
OR
- Diminish the speed limit (with TrafMan) of the accel-lane gradually until they prefer the highway.

Anyway, there is a high chance that they'd stay on a single lane, like on the others screenshots, depending on their destination.


Overall it seems that you have a very high road capability but a quite low flow of vehicles. Bigger roads are not always a solution, as vehicles tend to follow each other to reach their destination. Having multiple lanes is mostly useful when you have multiple ways to go at the next intersection, or the one after if quite close. 3 lanes being enough for the most part of your city.

 

[ristosal]

Acceleration lanes & highway have the same speed limit

This is incorrect, speed limit is 80 for the highway ramp.

 

[TrolKabu]

This is incorrect, speed limit is 80 for the highway ramp.

My bad then, bad memory !

It makes the shortest path explanation less plausible.

 

[funhave]

yes, I have give way signs, 80 on the accel lane and 130 on the main way, and most driving on the accel lane and then back to the main way
Can that be changed to choose the fastest or the shortest way?
If not from CO, then a second new point for the traffic manager?

 

[Fox_NS_CAN]

It makes the shortest path explanation less plausible.

I don't know this for sure, but I think the general consensus is that they pick the shortest route "time-wise" (therefore high speed highway will beat an equal length of slower speed regular road), but not taking any traffic into account, as if each vehicle was the only one in the city when planning the trip.