Thorum
The issue being that, with the frontage road not showing up on all route planners, this first stretch of Woudlaan is inaccessible as destination. 

I see two solutions : 
- either the entering frontage road has to be upgraded, 
- or this bit Woudlaan has to become both way (dead-end or not)

For me, that choice depends on if there is or not a one-way sign at the junction where the Woudlaan splits (and whether you are actually meant to get from this frontage to the Woudlaan). I cannot find a source which allows me to make that choice.