Two people are dead after a bicycle was hit by another vehicle on a highway in Illinois.

The crash happened Monday on Interstate 94 near Oakdale, about 100 miles north of Chicago, according to a news release from the Illinois State Police.

A police spokesman said the bicyclist was crossing the shoulder on the right when the car hit her.

The cyclist, who was not wearing a helmet, was taken to a local hospital where she died, according the release.

Police said the vehicle was a Honda Accord.

They said no charges had been filed.

Police identified the driver as 28-year-old Ryan J. Taylor, of Oakdale.

He was arrested and booked into the DuPage County Jail, according CBS affiliate WLS-TV.

Taylor was in the backseat and the bicyclists were in the front passenger seat, according police.

They were both wearing helmets at the time of the crash, authorities said.

The collision prompted a traffic study in the area to examine whether cyclists should be required to wear helmets.