Semitrailer tips over, closes US 95-I-15 on-ramp in Las Vegas By Alexis Egeland / RJ February 24, 2020 - 6:47 pmFebruary 24, 2020 - 6:47 pm Traffic is congested in the Spaghetti Bowl on Monday evening, where a semitrailer tipped over on the side of an on-ramp.