Yes, in the rear-vision mirrors, so that lights must be dipped: Correct
High beam headlights can cause glare not only to vehicles facing you but also to vehicles traveling in front of you, especially in their rear-view mirrors. The intense light from high beams can make it difficult for drivers in front to see clearly, causing discomfort and impairing their ability to drive safely. As a result, drivers are typically required to dip their headlights when approaching other vehicles from behind to avoid causing glare.
No, glare is caused only to facing vehicles: It is incorrect While high beam headlights do cause glare to oncoming vehicles, they can also affect vehicles in front of you through the rear-view mirrors. The glare is not limited to only facing vehicles.
Yes, reflected off the road: It is incorrect While high beam headlights can cause glare when reflected off surfaces like the road, the primary concern in this context is the glare experienced by vehicles in front through their rear-view mirrors, which is why headlights should be dipped when following or approaching other vehicles.