As a part of the larger interchange project, one northbound Interstate 19 lane at Ajo Way will be closed Wednesday night.  

Mike Christy / Arizona Daily Star

Interstate 19 at Ajo Way will be reduced to one lane starting Wednesday at 9:30 p.m. and ending early Thursday around 5 a.m. 

The closure will accommodate concrete pouring for a new barrier wall. The work is a part of the larger Ajo-I-19 interchange project, which is expected to conclude early this year.