[sumo-user] SUMO vehicle context subscriptions

[Hriday Sanghvi <sanghvih@xxxxxx>]

Hello,

I am a 2nd year PhD student at Trinity College Dublin, but I am new here.

I am trying to set a range on vehicles such that they detect the presence of any vehicle "X" metres in front of them. I am currently using a context subscription on each vehicle with a LaneFilter applied, setting downstreamDist to a value. ( https://sumo.dlr.de/daily/pydoc/traci._vehicle.html#VehicleDomain-addSubscriptionFilterLanes ). However, this does not seem to detect the vehicles "X" metres in a radial distance ( https://sumo.dlr.de/docs/TraCI/Interfacing_TraCI_from_Python.html#context_subscription_filters ) in the case where the vehicles meet each other at the intersection at a perpendicular angle.

It seems that using an SSM device would be ideal in this case, since it lists out all the information I might require ( https://sumo.dlr.de/docs/Simulation/Output/SSM_Device.html#encounter_types ). I am not able to figure out how to get this information dynamically though. Please advise.

Thank you.

Sincerely,

Hriday