The Openfietsmap is focussed on cycleways (in red) and cycle routes (blue dashed lines). Roads with red dashed borders are cycle lanes and solid red borders for roads with limited motor vehicle traffic such as cycling streets.
Cycleway open for mopeds (NL:G12a)
Cycleway (non compulsory) - often found in nature reserves like forests, heather etc (NL:G13)
Cyclestreet (NL: fietsstraat)
Tertiary road with cycling lanes
Tertiary road + forbidden for cycling
Secondary highway + forbidden for cycling
Primary highway + forbidden for cycling