And in response to Rolando, they were wearing lightish-colored clothing; Danielle blue [assuming she didn't change clothes in the few hours between the time I saw her last and the accident,] Shashank red. The street lighting varies depending on where between 15th and 20th streets one finds themselves; the point of the impact is moderately lit.
They saw the van approaching at a distance, but believed it to be at sufficient distance to allow safe passage. And Jholt has it right - there are ZERO crosswalks on Parker between 15th and 20th streets, yet there are six major campus structures between such streets, not to mention parking lots.
For the record, the students did in fact look both ways before crossing because they had to wait for three other cars to pass. I know this because I spoke with Shrestha in the hospital. Lose the attitude and gain some sympathy.