The Nevada Department of Transportation reopened Interstate 15 north of Las Vegas Friday after 4 p.m., but only partially for commercial vehicles.

One lane of traffic is open in each direction through the Moapa and Glendale area using the northbound interstate. The southbound interstate continues to be repaired and is projected to open the week of Sept. 22.

While commercial vehicles will be able to travel the Interstate southbound, they are only allowed to travel northbound on I-15 between 10 p.m. and 5 a.m. Between 5 a.m. and 10 p.m., commercial vehicles heading northbound will continue to be detoured via U.S. 93 between Las Vegas and Utah.

I-15 was closed Sept. 8 after approximately 2 miles of interstate was washed out by floodwaters. Hardest hit was between mile markers 91 to 93 in the Moapa and Glendale areas.

In the early morning hours following the flood, crews under contract with NDOT began repairs. Crews first removed flood debris, then rebuilt the base and ultimately paved eroded sections of northbound interstate. Initial repair costs are estimated at approximately $5 million. Under a state declaration of emergency issued Tuesday by Governor Sandoval, the Department will apply for federal reimbursement of repair costs.

"Our top priority is the mobility and safety of motorists," NDOT Director Rudy Malfabon said. "Rebuilding and repaving two miles of interstate in just four days has been nothing short of amazing. We're pleased to say that I-15 is now back open for travel. I appreciate the coordination and cooperation we have had with the Nevada Trucking Association, the Nevada Department of Public Safety and others."