As part of either converting US 30 to a freeway between Ames and Nevada or at least reducing the number of intersections, the R70 intersection east of I-35 is going to be turned into an interchange. There is a meeting Thursday but the map is already online (PDF).
The exit will be a bit to the east of existing R70 (which goes south to Cambridge) and frontage roads will be constructed. Interestingly, while the plan includes a new road between 590th and 580th streets, the direct intersection of 30 and 590th is not marked for closure. Five years ago, the Story County Board of Supervisors objected to a complete freeway conversion, which would block 590th and thus also Vetter Equipment Company. Perhaps a closure there would come only if/when another exit is built to the east.