Re: [sumo-user] Forcing buses to re-position to the beginning of a bus s

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

In a similar use case I solved this by setting the final <stop> to parking="true" and parkingLength to a value that is big enough to accommodate all buses (https://sumo.dlr.de/docs/Simulation/Public_Transport.html#bus_stops).

Alternatively, you can give the buses a lane-based stops with startPos and endPos values that are more specific.

It probably works if you define a waypoint (stop with positive speed) and give it an 'until' value. This forces vehicles to drive to the endPos and then delay for the 'until' time.

Am Do., 13. Juni 2024 um 13:09 Uhr schrieb Jan Přikryl via sumo-user <sumo-user@xxxxxxxxxxx>:

Dear all,

I want to simulate a daily circulation of vehicles on a public transport line and to accomplish this, I need to specify a final stop of that line where the vehicles are in fact queueing until they leave for the next leg of their trip. The standard behaviour of a bus stop seems to be that once the bus reaches the stop, it stops until its departure time, allowing for other buses to overtake it and stop in front of that vehicle in case that there is enough place available. In my case, ignoring the fact that trolleybuses do not overtake each other, I get situations when a trolleybus does not fit into the gap between other buses at the bus stop and ends being teleported to its next leg.

I am trying to solve this situation by forcing vehicles to move to the beginning of the bus stop area so that when the first vehicle leaves, the followers move towards the beginning of the stop. I thought I have forced SUMO to simulate this by repetitively specifying the same stop for the vehicle, i.e. by issuing

        <!-- move along the platform after the leader has left -->
        <stop busStop="ustredni_hrbitov#1" duration="10" until="17260"/>
        <!-- move along the platform again after the next leader has left -->
        <stop busStop="ustredni_hrbitov#1" duration="10" until="18145"/>
        <!-- leave the stop and serve the next leg of the circulation -->
        <stop busStop="ustredni_hrbitov#1" duration="10" until="19020"/>

but sometimes it works, sometimes it does not and the vehicle moves just a bit, leaving the front part of the bus stop area unoccupied.

I am not sure that the behaviour I wish for can be obtained this way -- after all, the vehicle is still at the desired stop area, so it is perfectly fine that a repeated command to stop at the same stopping place is ignored and that the "vehicle moves to the beginning of bus stop" behaviour is just a side effect and not guaranteed to work in all cases.

Any ideas how to solve this, barring a definition of e.g. three stops that are adjacent to each other?

Thanks!


--
Jan Přikryl
RICE FEL UWB  & CTU FTS
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