2.5 miles of southbound Interstate 11 between US 95 and Railroad Pass Casino Interchange opened at 5:00 a.m. Wednesday. 

This is part Phase 1 of the Interstate 11 project which will include a four lane freeway between Silverline Road and Foothill Drive with an interchange. It'll cost $83 million and is expected to be finished in late December. 

I-11 Phase 2 will extend that freeway another 15 miles connecting Nevada to Arizona. 

Read more on the project here