On Thursday, Sep. 28 and Friday, Sept. 29, the northbound Interstate 5 (I-5) on-ramp at Martin Way, near College St., will be temporarily closed from 10 a.m. to 2 p.m. The temporary closure is necessary for construction activity to be completed on the northbound I-5 on-ramp. The I-5 on-ramp is expected to reopen as soon as work is completed.