conjunto de datos de la red de tránsito modificado para incluir caminar; resultados de caminar erróneos

Question

¡Hola!<\/P> He creado un conjunto de datos de red GTFS y me ha funcionado bien para hacer análisis de transporte público. Lo que también quería determinar es cuántas paradas de autobús están a una distancia caminando de 15 minutos, así como el tiempo de viaje caminando entre ubicaciones.<\/P> Modifiqué el conjunto de datos existente de la Red de Tránsito para incluir caminar como modo de viaje, pero por alguna razón produce resultados erróneos. No puedo encontrar la causa y agradecería su consejo.<\/P> He publicado el conjunto de datos en este enlace si alguien está interesado: https:\/\/arcg.is\/1rv4nf<\/A><\/P>Muchas gracias de antemano,<\/P> Patrick<\/P> <\/P>

Melinda Morang · Accepted Answer

Hello Patrick.

I looked at your network, and I think I know what the problem is. The WalkTime cost attribute included in the network by default (created from the provided template) is not really meant to be used to model walking only. I realize this is a bit misleading. Essentially it is there to help create a reasonable walk time estimate for use in the transit calculations and so you can accumulate the total walking time used in your transit journeys. For this reason, it calculates the walk time along transit lines (LineVariantElements) and StopConnectors as 0. If you use the WalkTime cost attribute directly, it sees the transit lines as free to use, so your routes will be all weird.

If you want to use this network to model walking, you can do one of two things.

1) Cheat. Use your transit travel mode, but just don't set a time of day. The transit lines will never have any service and will be effectively restricted, and so all calculations will default back to walking.

2) Continue along the route you're currently on, but fix your walking travel mode. The easiest thing is to create a restriction attribute that makes LineVariantElements and StopConnectors restricted all the time and make sure this restriction is turned on for your Walking travel mode.