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HSLdevcom / digitransit-ui

Digitransit UI ("Reittiopas.fi")
https://www.reittiopas.fi/
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Too few search results showing in long distance traffic #2102

Open kemkim opened 6 years ago

kemkim commented 6 years ago

When searching nationwide trips, a following problem has repeatedly shown, that each search results only one or two alternative trips, and to see more trips, you need to click before or after buttons to see more. It is maybe done to avoid excessive route calculations in nationwide big timetable data system, but I think that at least three or five search results would be necessary. Current search results make you think, that there really would not be more available trips in specific day. oulu1

But there actually are! If you click previous or next buttons.

oulu2

kalon33 commented 6 years ago

Hello,

This behaviour is due to a timeout when searching for itineraries. Nationwide searches are more complicated to perform than local ones, so take more time.

----- Mail d'origine ----- De: kemkim notifications@github.com À: HSLdevcom/digitransit-ui digitransit-ui@noreply.github.com Cc: Subscribed subscribed@noreply.github.com Envoyé: Sat, 13 Jan 2018 08:52:11 +0100 (CET) Objet: [HSLdevcom/digitransit-ui] Too few search results showing (#2102)

When searching nationwide trips, a following problem has repeatedly shown, that each search results only one or two alternative trips, and to see more trips, you need to click before or after buttons to see more. It is maybe done to avoid excessive route calculations in nationwide big timetable data system, but I think that at least three or five search results would be necessary. Current search results make you think, that there really would not be more available trips in specific day. oulu1

But there actually are! If you click previous or next buttons.

oulu2

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kemkim commented 6 years ago

Is it demanded of Finnish Transport Agency that Digitransit must not use more computer time to calculate more search results? Formerly old version of Matka.fi gave 3 to 5 alternative search results each time.

vesameskanen commented 6 years ago

This is a performance issue of the routing algorithm itself. Returning 5 alternatives might require an unreasonable long waiting time from the user. If the route search takes, say, over 1 minute, there is a risk that user closes the application.