There's a curved glass building just east of SR 128 (I-95) in Waltham, Mass., west of Boston, that focuses the late afternoon sun's rays directly into the eyes of southbound drivers. At some times of the year, that happens during the rush hour. I'm not personally aware of any accidents that it's caused, I live 70 miles away and don't follow local Waltham news, but I wouldn't be surprised to learn that it has.