Routing not making use ramps to turnaround faster

When generating a route the server is not using the off-ramps to make a u-turn but rather moving all the way down the highway which causes the route to be much longer than what is possible. See here

https://www.openstreetmap.org/directions?engine=fossgis_osrm_car&route=20.0135%2C41.4811%3B19.9922%2C41.5190#map=13/19.9762/41.5221

alt text

Whereas in Google Maps you get this https://www.google.co.za/maps/dir/20.0100%0941.4795/19.9910%0941.5190/@20.0041348,41.4936417,15z/data=!4m10!4m9!1m3!2m2!1d41.4795!2d20.01!1m3!2m2!1d41.519!2d19.991!3e0

alt text

The routing server is not making use of the off-ramps

alt text

I am using OSM server for routing inside an application that is calculating distances by route. Any suggestions on how this can be fixed?

routing

asked 19 May '22, 08:27

Jaco-Ben
16●1●1●2
accept rate: 0%

One Answer:

active answers oldest answers newest answers popular answers

The North/South Trunk road is tagged with construction=trunk. I guess OSRM is avoiding that road because of that. Please remove that tag from all the segments of that road that have been opened to traffic.

permanent link

answered 19 May '22, 10:48

TZorn
12.3k●7●64●225
accept rate: 15%

I downloaded this pbf file https://download.geofabrik.de/asia/gcc-states.html, created my own custom routing graph and now the issue is not reproducible.

(20 May '22, 13:03) Jaco-Ben

Spot on. I only wanted to add: use the debug map to find which way might be the culprit. It is not linked from openstreetmap.org, but using routing.openstreetmap.de you will find it: https://routing.openstreetmap.de/debug/car.html#16/19.9928/41.5196

(21 May '22, 17:11) datendelphin

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here

By RSS:

Answers

Answers and Comments

Markdown Basics

*italic* or _italic_
**bold** or __bold__
link:[text](http://url.com/ "title")
image?![alt text](/path/img.jpg "title")
numbered list: 1. Foo 2. Bar
to add a line break simply add two spaces to where you would like the new line to be.
basic HTML tags are also supported

learn more about Markdown

Question tags:

routing ×305

question asked: 19 May '22, 08:27

question was seen: 987 times

last updated: 21 May '22, 17:11

Routing not making use ramps to turnaround faster

Follow this question

Related questions