question

issiaka asked May 19, '23 Julie Weller commented May 30, '23

How to build a traffic light logic ?

I am trying to build a traffic light logic at the intersection of my model.

However, everytime the traffic controller goes green, only one vehicle is allowed to go.

I need some help to fix this so every following vehicle can also leave until the Traffic Control1 goes red.

Attached is the model: network-nodes-and-trafic-control-update.fsm

Software Version:

FlexSim 23.1.1

traffic light logic

network-nodes-and-trafic-control-update.fsm (3.1 MiB)

· 3

Jason Lightfoot ♦ commented · May 19, 2023 at 04:04 PM

Do you have a model that runs?

We encourage students to research and try and solve the problems themselves and if they get stuck offer guidance.

Here's the documentation for the Traffic Control.

Here's a previous post and example.

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issiaka Jason Lightfoot ♦ commented · May 19, 2023 at 06:09 PM

Sorry, here is the working model: trafficlightlogic.fsm

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trafficlightlogic.fsm (3.1 MiB)

Julie Weller commented · May 30, 2023 at 01:43 PM

Hi @issiaka, was Jason Lightfoot's answer helpful? If so, please click the "Accept" button at the bottom of their answer. Or if you still have questions, add a comment and we'll continue the conversation.

If we haven't heard back from you within 3 business days we'll auto-accept an answer, but you can always unaccept and comment back to reopen your question.

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Jason Lightfoot answered May 24, '23 Jason Lightfoot edited May 24, '23

You should use the entryRequest trigger to return the correct value for the color state to "allow" entry or "queue". Add that either directly or in a process flow with a return value override:

I would also increase the max travelers from zero - that just seems odd.

1684933422802.png (7.6 KiB)