Stop osrm "connecting" to the network via certain types of roads

[tra6sdc]

Hello, I have this origin/destination route and the distance isn't reasonable. What is happening is that the origin is connecting to a Motorway, between junctions, then travelling down to the Motorway exit, leaving the motorway and travelling back to the destination. This distance is 11.1km whilst the distance when the origin connects to a local road should be 300m (or 500m if we count the distance to connect to the road). Is there a way to stop the connecting to certain types of road?

http://map.project-osrm.org/?z=13&center=53.623925%2C-1.570873&loc=53.642224%2C-1.533966&loc=53.641620%2C-1.528497&hl=en&alt=0&srv=0

I have setup my own local server using these instructions: https://github.com/Project-OSRM/osrm-backend/wiki/Running-OSRM

I changed these two parameters in the car.lua files from the default (my .lua files are old, the date stamp is July, 2018):

properties.continue_straight_at_waypoint   = false
properties.left_hand_driving               = true

[rCarto]

In osrm you can use the exclude arg.
osrmRoute(..., exclude = "motorway")

[tra6sdc]

Thanks. I tried this

 try(osrmRoute(src = o, dst = d, overview = FALSE, exclude = "motorway"))

and I get the error message:

Error : OSRM API request failed [400]
InvalidValue
Exclude flag combination is not supported.

I am happy for the route to include a motorway just NOT match to a motorway at the start of the route. BUT if to enable a match to a non-motorway road at the start I needed to exclude motorways entirely, that's fine. But using what you have suggested no routes are found. Thanks for looking into this issue. Should I be raising it on the Project-OSRM github instead?

[rCarto]

This problem could be solved with the OSRM nearest service, not yet implemented in the R package.
The exclude parameter is not implemented in the OSRM demo server but it should work with a local recent version of OSRM. Maybe your version is a bit outdated?

[tra6sdc]

Thanks. The R package is 4.0.0 which is up to date.

I am happy to update the Windows software. The versions I am using are old, from before July 2018. Can you remind me where to obtain more recent versions? I will then try the exclude parameter. Thanks.

28/07/2018  11:07         (155,136) osrm-components.exe
28/07/2018  11:07         (947,200) osrm-contract.exe
28/07/2018  11:07         (873,472) osrm-customize.exe
28/07/2018  11:07         (506,880) osrm-datastore.exe
28/07/2018  11:07       (3,159,040) osrm-extract.exe
28/07/2018  11:07         (685,056) osrm-partition.exe
28/07/2018  11:07         2,317,824 osrm-routed.exe

[rCarto]

I don't know how to install OSRM on windows. The best place get instructions is probably the OSRM server GitHub repo.

[tra6sdc]

Thanks. I've looked at that page previously and been unable to comprehend it. I'll just stick with having this issue.