A man, 38, walked onto the southbound side of I-93 at South Bay around 1 a.m. on Tuesday and was hit and killed by a car in the left lane, the Suffolk County District Attorney's office and State Police report.

According to the DA's office, "the operator remained at the scene, called 911, did not show any signs of impairment, and gave an interview with investigators in which he made statements corroborated by at least one witness that the pedestrian appeared suddenly in the roadway. A reconstruction of the crash is under way to determine whether speed was a factor, but there are no charges at this time."

EMTs took the driver, a 47-year-old man from Brockton, to a local hospital for observation, State Police say.