A sedan crashed into a retention pond Thursday, leaving the driver dead and shutting down the northbound ramp from I-75 to Chastain Road for about two hours.

The accident happened just before 6:40 a.m., Cobb police Sgt. Dana Pierce said.

The ramp reopened just before 8:50 a.m., according to the Cobb County Department of Transportation.

Traffic was slowly improving in the area, according to the WSB 24-hour Traffic Center.

The victim’s name, the cause of the crash and other details have not been released.

—Please return to AJC.com for updates.

» For updated traffic information, listen to News 95.5 and AM 750 WSB and follow @ajcwsbtraffic on Twitter.

In other news:

Channel 2's Darryn Moore reports.

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A migrant farmworker harvests Vidalia onions at a farm in Collins, in 2011. A coalition of farmworkers, including one based in Georgia, filed suit last month in federal court arguing that cuts to H-2A wages will trigger a cut in the pay and standard of living of U.S. agricultural workers. (Bita Honarvar/AJC)

Credit: Bita Honarvar