UPDATED: October 21, 2018, 10:52 PM

DALLAS (CBSDFW.COM) – A Dallas police officer is in critical condition after a vehicle struck him on I-20 shortly after 6:30 a.m. Sunday.

The crash happened in Dallas near Mountain Creek Parkway.

According to a witness, the driver of a Toyota Venza was traveling westbound I-20, and when he was approaching the crash scene, he drove around a squad car with its emergency lights illuminated onto the emergency shoulder of the far right lane.

When the driver re-entered the roadway, he struck the officer standing in the far right lane. The driver of the Toyota remained at the scene.

The officer, a two-year veteran of the department, was transported to Methodist Central Hospital where he remains in critical condition but has improved.

The 57-year-old male driver was identified as Boniface Madubuko, and he was charged with aggravated assault on a public servant.

Police have not released the identity of the injured officer.