The Iowa DOT will have an open house and information meeting at the Ames Public Library tonight regarding the six-laning of I-35 from the end of the present project near IA 210 to the US 30 interchange.
PDFs are available at the meeting link. The new alignment of the interstate isn’t entirely straight. Notably, the little weave just south of US 30 where the southbound lanes move away from the northbound lanes is retained.
As for the US 30 interchange itself, the three remaining loops of the cloverleaf are retained, but rebuilt. Also, another lane of eastbound US 30 will be built from the Dayton Avenue on-ramp to the exit to southbound I-35.
Construction will not start until 2029 (second half of 2028) at the earliest.