| Paige Yontz | AARP Iowa | Supporting | GA90 |
| Jon Murphy | American Planning Association Iowa Chapter | Supporting | GA90 |
| Tom Cope | American Planning Association Iowa Chapter | Supporting | GA90 |
| Brad Epperly | BNSF Railway Co. | Undecided | GA90 |
| Dustin Miller | BNSF Railway Co. | Undecided | GA90 |
| Michael Walker | Brotherhood of Locomotive Engineers and Trainmen | Supporting | GA90 |
| Kate Walton | CN Rail | Undecided | GA90 |
| Madeleine Bradley | CN Rail | Undecided | GA90 |
| Matt Eide | CN Rail | Undecided | GA90 |
| Doug Struyk | City of Iowa City | Supporting | GA90 |
| Jennifer Dorman | City of Iowa City | Supporting | GA90 |
| Jim Carney | City of Iowa City | Supporting | GA90 |
| Clare Gill | Dubuque Area Chamber of Commerce | Undecided | GA90 |
| Ryan Sempf | Dubuque Area Chamber of Commerce | Undecided | GA90 |
| Steve Falck | Environmental Law and Policy Center | Supporting | GA90 |
| Andrea Woodard | Greater Des Moines Partnership | Supporting | GA90 |
| Brad Epperly | Greater Des Moines Partnership | Supporting | GA90 |
| Dustin Miller | Greater Des Moines Partnership | Supporting | GA90 |
| Jessica Mazour | Iowa Chapter of Sierra Club | Supporting | GA90 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Supporting | GA90 |
| Barbra Solberg | Iowa City Area Business Partnership | Supporting | GA90 |
| Susan Fenton | Iowa Dept. of Transportation | Undecided | GA90 |
| Deanna Triplett | Iowa Economic Development Authority | Undecided | GA90 |
| Jefferson Fink | Iowa Interstate Railroad | Undecided | GA90 |
| Jim Obradovich | Iowa Interstate Railroad | Undecided | GA90 |
| Victoria Sinclair | Iowa Interstate Railroad | Undecided | GA90 |
| Amy Campbell | Professional Developers of Iowa (PDI) | Undecided | GA90 |
| Chloe Gayer | Professional Developers of Iowa (PDI) | Undecided | GA90 |
| Craig Patterson | Professional Developers of Iowa (PDI) | Undecided | GA90 |
| Brad Epperly | Quad Cities Chamber of Commerce | Supporting | GA90 |
| Casey Nickel | Quad Cities Chamber of Commerce | Supporting | GA90 |
| Dustin Miller | Quad Cities Chamber of Commerce | Supporting | GA90 |
| Ryan Sempf | Quad Cities Chamber of Commerce | Supporting | GA90 |
| Chris Smith | SMART-Transportation Division | Supporting | GA90 |
| Michael Triplett | Union Pacific Railroad | Undecided | GA90 |