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Open Source Routing Engine for OpenStreetMap
https://valhalla.github.io/valhalla/
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Route returned by Mapzen is extra-fast (too fast?) #466

Open kevinkreiser opened 7 years ago

kevinkreiser commented 7 years ago

(2016-12-29T15:15:37Z) @fnicollet : originally created valhalla/thor#539

Hello,

A user of my application came back to me with a route that takes a very different time if you ask Mapzen or if you ask Maps.

Here is the route in Google Maps: https://www.google.fr/maps/dir/52.264152,-4.183226/'52.297164,-1.960593'/@52.3822225,-3.5132051,8.75z/data=!4m6!4m5!1m0!1m3!2m2!1d-1.960593!2d52.297164

About 3h20, wether you go via KidderMinster or Worcester

Same route in OpenStreetMap, using Mapzen (it is a routing "engine", the one that Maps Pro uses under the hood) : http://www.openstreetmap.org/directions?engine=mapzen_car&route=52.2643%2C-4.1837%3B52.2972%2C-1.9606#map=9/52.3521/-3.0707&layers=T

About 2h37 via KidderMinster

Same in OpenStreetMap, using OSRM : http://www.openstreetmap.org/directions?engine=osrm_car&route=52.2643%2C-4.1837%3B52.2972%2C-1.9606#map=9/52.3135/-3.0700&layers=T

About 3h20, via Kington and Worcester

So Mapzen seem to be the only odd one out. Can this behaviour be explained? Do you have different max speeds compared to the other services?

Thanks, Fabien

(2016-12-30T14:57:54Z) @dnesbitt61 : Do you have any idea what the true drive time is for this route (without traffic incidents)? I see that many of the ways in OSM have max_speed of 60 mph and even 70 mph. Most of the path is trunk road with some primary. The average speed for this route is about 45 mph, which doesn't seem too bad.

(2016-12-30T17:09:11Z) @fnicollet : Thanks for your answer. He (he is local) says it takes about 3h30

Le 30 déc. 2016 15:57, "David Nesbitt" notifications@github.com a écrit :

Do you have any idea what the true drive time is for this route (without traffic incidents)? I see that many of the ways in OSM have max_speed of 60 mph and even 70 mph. Most of the path is trunk road with some primary. The average speed for this route is about 45 mph, which doesn't seem too bad.

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fnicollet commented 7 years ago

Hello,

This issue is still relevant. The OSRM estimation changed a little (from 3h20 to 2h56) but still, Mapzen shows up 2h40 while the trip is more like 3h20

Thanks, Fabien