Glare guards are traffic safety products installed on the median strips of highways to address the issue of oncoming headlights dazzling. They are commonly set up on the guardrails or in the middle of them along the median, and some are also installed on the central opening sliding guardrails. They are categorized by material into steel glare guards, plastic glare guards, and fiberglass glare guards. In terms of appearance, there are common straight plates, reverse S-shaped, embossed glare guards, and highway landscape glare guards, among others.