MANUELITO, N.M. — Traffic on Interstate 40 is slowly getting back to normal after a train derailment shut parts of it down Friday.

The derailment happened Friday near the New Mexico-Arizona state line.

Between Laguna Pueblo and Gallup, about a 100-mile stretch, authorities only let local residents through with proof of residency. Many other drivers, including truckers, had to detour in Albuquerque from I-40 to I-25 to then catch I-10 in southern New Mexico.

All of this stranded hundreds of semi-trucks and cars. People waited for hours in bumper-to-bumper traffic. 

On Sunday, officials said parts of I-40 are now open, but drivers may still face some detours.

State officials say westbound I-40 is open. However, they’re urging drivers to use caution. They also drivers may need a police escort to pass the roadway due to heavy smoke.

McKinley County Fire Rescue confirms eastbound lanes on I-40 are now open, including mile marker 33 in Arizona.

Their photos show crews removing debris off the roads Sunday night. Firefighters also worked to stop the fire from spreading.

According to officials, crews have removed some of the wreckage.

Officials say about six of the 35 rail cars were carrying propane. At one point, officials say about 40 people, living within a two-mile radius, had to evacuate.

They say there is no concern for air quality, but they’re keeping an eye on it.

The cause of the derailment remains under investigation.

Folks who have been directly impacted by this incident can call the BNSF incident hotline at 1-866-243-4784.

The derailment comes a month after a BNSF train derailed in Socorro. That derailment spilled millions of pounds of corn.