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I found the definition of network in SUMO is cumbersome, but FLOW makes it easier to define a larger network (e.g. 10*10 grid) in a more flexible way. I also hope vehicles can turn with certain probablities at intersections. Can I define such network and use traCI to control the generated traffic lights?

I have tried using traCI to control traffic lights of a small network generated by SUMO. We need to define routes for different type of vehicles, and I don't know how to expand the network and route vehicles with probability.

Pao Raw
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This is a great question. Adding this capability is in progress and is tracked in this issue: https://github.com/flow-project/flow/issues/682

Eugene Vinitsky
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  • Thank you for your response. Since FLOW can control the traffic light with traCI in a RL experiment, can we directly call traCI in a non-RL simulation? If we can take advantage of FLOW to define the large grid network and set traffic flow, then can we call traCI to control the defined traffic lights? Is there any conflict? – Pao Raw Aug 28 '19 at 01:39
  • Basically I am asking, can we use FLOW to create the scenario/environment, and then use traCI to control the traffic lights we defined before? I think FLOW's convenience of defining network and vehicle flow should be combined with others. – Pao Raw Aug 28 '19 at 01:54
  • I also would like to know how FLOW starts traCI when they apply RL rules to those traffic lights? Looks like traCI needs a network and route xml files in a specific format. I haven't seen such commands to generate those files for traCI. How does FLOW call traCI and use it to control traffic light? – Pao Raw Aug 28 '19 at 02:52
  • Yes, you can directly call traCI in a non-RL experiment. I would take a look at the traffic light tutorial in the tutorials folder; it should (I hope!) answer most of these questions. We are actually directly using traCI to control the traffic lights as is; the network and node files are automatically generated by the Scenario classes. For more info on those there is a tutorial as well! – Eugene Vinitsky Aug 29 '19 at 21:53
  • Hi Pao, we're migrating stackoverflow support to a Slack channel to make for easier responsiveness. Please join us at https://join.slack.com/t/flow-users/shared_invite/enQtNzk5NzE1OTkyNTE0LTU0YmE5ZTVkZmJmNDg1Nzg2YThjOThmY2ZlYWE2ZjQ0NTE1NjE3Y2YwMTljY2U5M2Y3MDhmMWUzZDM3YWViNmE! – Eugene Vinitsky Nov 08 '19 at 18:01