Same in Netherland. Arrow means it's guaranteed to be safe (unless a pedestrian is running a red light, which is possible and not an excuse to hit them), wherea

Same in Netherland. Arrow means it's guaranteed to be safe (unless a pedestrian is running a red light, which is possible and not an excuse to hit them), whereas a solid circle means you have to watch out for crossing bikes and pedestrians (though of course you should always watch out).