The default rules for an allway_stop are, that vehicles without waitingTime are forbidden from passing the intersection (this is why you keep seeing isOpen=False). Internally, the rule is indeed to compare waitingTime and give priority to the vehicle with the larger value (some subsecond noise is added as a tiebraker).
regards, Jakob Am Do., 29. Feb. 2024 um 16:54 Uhr schrieb Daniel Aguilar Marsillach via sumo-dev <sumo-dev@eclipse.org>: > Hi there, > > I am trying to extract vehicle priority information in two cases: 1) > four-way priority-based intersection 2) four-way always stop intersection. > I am using the latest version of SUMO and am developing through the Python > API. > > I have used sumolib.net to perform a static map analysis of what lanes > have priority and which are foes of each other, from which I can extract > map-based priority rules at priority-based junctions. > > However, for the always stop case, how can I extract which vehicle has > priority at a given moment in time if there are multiple vehicles approach > the intersection or if there are multiple vehicles stopped at the > intersection? I have been using traci.vehicle.getJunctionFoes(veh_id), > traci.vehicle.getNextLinks(veh_id), traci.lane.getLinks(lane), > traci.lane.getFoes(lane_ID, to_laneID) but I have run into some issues. > > I believe that traci.lane.getLinks(lane), traci.lane.getFoes(lane_ID, > to_laneID) are useful for static map analysis but not for the dynamic > scene. Is this correct? > > I setup a case where a single vehicle approaches the four-way (always > stop) scenario without any other traffic. The vehicle stops but getLinks() > is always returning isOpen=False, hasPrio=False, and hasFoe=False. Is this > the standard output at an always stop case? Do those boolean flags ever > change with time? I have noticed the same with > traci.vehicle.getNextLinks(veh_id). > > However, self.k.kernel_api.vehicle.getJunctionFoes(veh_id) does return an > empty list in this toy example. Is it sufficient to consider the foes of > each vehicle at an intersection and if any vehicle has an empty list of > foes, then it is the vehicle with right of way? I know that impatience > parameters can affect which vehicle crosses whhen as well. > > I initially thought that using traci.vehicle.getWaitingTime() or > traci.vehicle.getAccumulatedWaitingTime() would indicate which vehicle at > intersection has right-of-way (the one with the highest waiting time). > Should this be the case? getWaitingTime() resets to 0 if a vehicle inches > near the stop line so I am not sure this would be the most reliable > indicator. Is there a different way to extract which vehicle's turn it is > to cross in an always stop scenario? What are the rules being used for > this? > > Let me know if you have any suggestions on how to do extract vehicle > priorities in dynamic/interaction-based intersections. > > Best, > > Daniel > > > > > > Nothing in this message is intended to constitute an electronic signature > unless a specific statement to the contrary is included in this message. > > Confidentiality Note: This message is intended only for the person or > entity to which it is addressed. It may contain confidential and/or > privileged material. Any review, transmission, dissemination or other use, > or taking of any action in reliance upon this message by persons or > entities other than the intended recipient is prohibited and may be > unlawful. If you received this message in error, please contact the sender > and delete it from your computer. > > Nothing in this message is intended to constitute an electronic signature > unless a specific statement to the contrary is included in this message. > > Confidentiality Note: This message is intended only for the person or > entity to which it is addressed. It may contain confidential and/or > privileged material. Any review, transmission, dissemination or other use, > or taking of any action in reliance upon this message by persons or > entities other than the intended recipient is prohibited and may be > unlawful. If you received this message in error, please contact the sender > and delete it from your computer. > _______________________________________________ > sumo-dev mailing list > sumo-dev@eclipse.org > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-dev >
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