(NDOT) The I-15 northbound onramp and offramp at Exit 118 (S. Lower Flat Top Dr.) will be closed from 7:00 p.m. to 6:00 a.m. five nights. The closures begin the night of Sunday, April 10 and conclude the morning of Friday, April 15. Ramps will be open during non-working hours. The closure is necessary for the final phase of installation of ITS conduit and paving at Exit 118.