The deceased were identified as Collin McElroy, 16, and Jerry Warfel, 14, both of Honey Brook, and Evan Pringle, 15, and Kyle Marsh, 17, both of Coatesville.
The four were ejected from the car. Police would not say who was driving it or release its make and model.
"This is still under investigation," Kimes said. Police asked any witnesses to call the department at 610-380-8201.
The car flipped over and slid up an embankment just before 1 a.m.
Jim Stringer, who lives nearby off Route 82, said accidents were frequent at the intersection, which he drives through to get to work.
"Someone ran a light and hit a guy on a motorcycle a couple months ago, and around the same time a couple of horses who escaped from a barn were killed by a car," Stringer said.
"When the light turns green, I don't move until I see no one is coming, because there are so many accidents there," he said.
Close to the intersection is a sign with blinking lights that says "Dip 200 feet," and then there is a bump on Route 322.
The teenagers attended the Coatesville Area School District, which plans to hold free grief counseling from 9 a.m. to 2 p.m. Tuesday at its 11/12 library.
A funeral services for McElroy will be held at 11 a.m. Thursday at Olivet United Methodist Church, 310 E. Chestnut St., Coatesville, after a visitation at 9. Burial will be at Fairview Cemetery.
Wilde Funeral Home is handling McElroy's arrangements and private services for Pringle, who is being cremated.
Funeral arrangements for the other two students were not yet known.
Wilde Funeral Home said on its website that McElroy had just completed his sophomore year at Coatesville Area High School, where he was on the baseball team. "He also was active, for over 10 years, with the Caln Little League. He enjoyed boating with his family and friends at Raystown Lake," the funeral home noted.
Contact staff writer Jan Hefler
at 856-779-3224 or firstname.lastname@example.org.