Soubor GTFS transfers.txt není využíván při analýze tras

Question

Ahoj! Mám ve své složce GTFS soubor transfers.txt a chtěl bych, aby byl při analýze tras zohledněn min_transfer_time ze souboru transfers.txt. Nicméně jsem si všiml, že můj soubor transfers.txt není využíván v žádném z nástrojů GTFS v ArcGIS Pro. <\/P> Pečlivě jsem sledoval kroky v Vytvoření a použití síťového datasetu s daty veřejné dopravy013 ArcGIS Pro | Dokumentace<\/A> a zjistil jsem, že všechny nástroje používané při zpracování síťového datasetu nevyžadují soubor transfers.txt jako vstup. <\/P>Takže se ptám, zda neexistuje nějaký nástroj nebo krok, který jsem vynechal, aby můj síťový dataset mohl číst soubor transfers.txt a já tak mohl zahrnout čas přestupu při přestupu mezi službami veřejné dopravy? <\/P> Děkuji!<\/P>

Melinda Morang · Answer

Regarding directions text: No, there is not currently any way to get further details in your directions. We have not updated the directions engine to report any details about the public transit service used. There are technical reasons for this. The main one is that although the Public Transit evaluator internally has access to the route and trip IDs that were used, an evaluator cannot return this information to the directions engine. It can only return the travel time. Updating evaluators to return additional information would be a major surgery in our network data model and associated code, and this is not work we have prioritized yet. Our public transit capabilities are intended for analysis, not for passenger-facing apps where directions should be used.

Regarding the TotalWait_ and TotalViolation_: These fields do not mean what you think they mean. They do not relate to the time a passenger would wait for a bus, for example. Rather, these are standard Route output fields that are only populated when using time windows. Please read this documentation for a description of what these fields mean.

Regarding limiting transfers: There is currently no way to do this, although it's something I know is really important! My team was recently brainstorming some enhancements that could potentially make this possible, but we do not currently have any solid plans to implement anything.

VeraLim · Answer

Thank you for your suggesting on using the StopConnectors feature class to include the transfer time!

I have a few questions that i hope to seek clarification from you.

Firstly, from what I understand, the route analysis direction does not state the public transit service that it is taking as it simply states "Take public transit". I am wondering if there is a way or tool to generate more details regarding the public transit service? Since the GTFS includes the route_id and trip_id that the network dataset can reference to.

Secondly, in the route layers, there are several fields: TotalWait_PublicTransitTime, TotalWait_WalkTime, TotalViolation_PublicTransitTime, and TotalViolation_WalkTime that are all empty. This is the case for the tutorial dataset that is provided as well. I am wondering if this is supposed to be the case? Otherwise, is there a way for me to generate these details?

Lastly, may I know how I can limit the number of transfers in the route analysis? This is because one of the intended outcomes that I want is to create a travel mode that runs analysis with the least number of transfers, in spite of the additional time or distance cost.

Thank you!

Melinda Morang · Answer

Okay, that makes sense. If you are creating your GTFS dataset specifically for the purpose of using with Esri tools, don't bother with transfers.txt. You might be able to manually edit in this information by applying specific delay times or restrictions using the StopConnectors feature class in the data model and adjusting the network's evaluators to use that information.

We do not have any courses related to multimodal networks. The tutorial you found is the best resource. Feel free to post more questions here if you have them, though.