If they were trailmarkers for bike routes, I even provided evidence that the signs used in The Netherlands (and Belgium) are not part of the standard street infrastructure, but are designated trailmarkers for recreational purposes (so not to get from point A to point B, but to promote exploring), however it looks like this didn’t change their mind)
https://community.wayfarer.nianticlabs.com/t/dutch-biking-trails/100661?u=pokemaster4u2Dutch biking trails
