UPDATE: Sept. 23 at 8:35 a.m. The London-Laurel Rescue Squad reports that I-75 northbound at mile marker 29 is back open after a crash that happened on Monday morning. Original Story: The London-Laurel Rescue Squad reports that I-75 northbound at mile marker 29 is shut down due to a crash on Monday morning. Officials ask drivers to seek an alternate route. This is a developing story. Check back for the latest updates.