[sumo-user] TraCI subscriptions to route changes

[Lara CODECA <lara.codeca@xxxxxxxxxx>]

Dear all,

is there a way to subscribe to the route changes events?

I saw subscribeContext in
http://www.sumo.dlr.de/daily/pydoc/traci._simulation.html#SimulationDomain-subscribeContext 
and
#  command: subscribe route context
CMD_SUBSCRIBE_ROUTE_CONTEXT = 0x86
#  response: subscribe route context
RESPONSE_SUBSCRIBE_ROUTE_CONTEXT = 0x96
#  command: get route variable
CMD_GET_ROUTE_VARIABLE = 0xa6
#  response: get route variable
RESPONSE_GET_ROUTE_VARIABLE = 0xb6
#  command: set route variable
CMD_SET_ROUTE_VARIABLE = 0xc6
#  command: subscribe route variable
CMD_SUBSCRIBE_ROUTE_VARIABLE = 0xd6
#  response: subscribe route variable
RESPONSE_SUBSCRIBE_ROUTE_VARIABLE = 0xe6

among the constants, but given that the context requires a radius around a the ego-vehicle, I'm
probably going in the wrong direction.

I saw that I can subscribe to traci.vehicle.subscribe(vehid, varIDs=(tc.VAR_ROUTE_INDEX)) but this
imply I have to see if the route index is different, so I'm jamming TraCI for no reason.
I need to know when the route of some vehicles is changed by sumo (device router or other). 
If there is no way to do it, at the moment, where do I have to look in the code to know how to add
a subscription of this kind?

Thanks in advance!

Regards,
Lara

-- 
Lara CODECA
Postdoc
Tel : 04.93.00.81.51

EURECOM
Campus SophiaTech
http://www.eurecom.fr/