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Shubham C2 avatar image
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Shubham C2 asked Shubham C2 commented

Road & Junctions data in A Star module.

I am working on a Traffic Flow Analysis using A Star module. What are the ways in which I can get quantifiable data on usage of different roads and Junctions.
Ex. I want data like, "On an Average how many Vehicles Crossed certain Junction in an hour";

"On an Average how many Vehicles traveled a given Road in an hour"

I am looking for an element which have triggers like on arrival fired when some objects passes from it (Like Decision Points in Conveyors).

Additional doubt : I am not able to see the heat map. Is it because i am using "Flow item as A-Star.." from the 'use resource' of the source and not the general A-Star Task Executor Members ?

FlexSim 19.1.0
a starcongestion analysisaisle busy time
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tannerp answered Shubham C2 commented

Hi @Shubham C2,

I'll try to answer each of your questions. First of all, I'm sure you've discovered within basic A* functionality the option of showing the heat map. This works for both Task Executers and when using the "AStar: Task Executer as Flowitem" option, as shown in my example model. Maybe you could attach your model and we can look and see why that functionality isn't working.

As for the statistics, you can visualize the areas using a heat map, like in the image below. This is probably the most straightforward way to analyze your traffic.

For a more in-depth analysis of each grid space, you can dig into the tree and take the data from the nodes shown in the next image. This is more involved than just clicking a button, but I'm sure you could find a way to manipulate this data (perhaps in Excel) to show statistics for individual points of the A* grid. Hopefully this helps.

road-junction-data.fsm


average-block-time.png (92.3 KiB)
extra-astar-data.png (148.1 KiB)
road-junction-data.fsm (35.1 KiB)
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Shubham C2 avatar image Shubham C2 commented ·

Thanks @tanner.p for your response.

I have managed to solve the Heat Map issue. Turns out if I uncheck the Show Grid Nodes option, heat Map is being generated (In my previous projects, i never had to do this). But even this has some issues like :While the model is running in this mode, i cannot see many Objects like : some Queue's , some Processors, all A Star Barriers etc.

Also, Model gets crashed many times when i press Reset.

Maybe this is because the Model is very big in terms of A-Star Controlled Area (Grids).

Sorry, I Cannot Share the Model file as per my Company's Policies.

Also , Can you Please verify what is meant by "bonusRight(left,up,down) " in the extraData node.

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Braydn T avatar image Braydn T Shubham C2 commented ·

@Shubham C2

Can you upload the model that is having this issue?

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Shubham C2 avatar image Shubham C2 Braydn T commented ·

Thank You @tanner.p

Sorry, I Cannot Share the Model file as per my Company's Policies.

If you can explain, what is meant by "bonusRight(left,up,down) " in the extraData node, it will be helpful.

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Shubham C2 avatar image Shubham C2 Shubham C2 commented ·

@tanner.p

I will try to experiment and find the meaning behind the mentioned nodes.
I tried to replicate the conditions in a demo model but I could not.

Objects disappearing & Heat map not coming up, these issues comes after 1-2 model runs . for the 1st and 2nd runs it usually runs without the issue. When i close and open the model again, it again works for 1(or 2) runs.
I will try to replicate the issue in smaller model.
Also, these issues are not related to model run speeds, i have tried at very low speed but it does not help.

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Cliff King avatar image Cliff King Shubham C2 commented ·

I believe there have been some heat map bug fixes in releases since 19.1 that may resolve these type of issues, right @phil.bobo

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