The NRPC Transportation Technical Advisory Committee (TTAC) is charged under the NH Department of Transportation planning process to provide the commission with technical guidance regarding transportation policy and projects in the region. The committee ensures that NRPC decisions are consistent with community goals and objectives, incorporate sound planning principles, and are open and accessible to input from the general public.
Representatives
| Amherst | Will Ludt | Eric Slosek (a) |
| Brookline | Scott Leard |
| Hollis | Joan Cudworth |
| Hudson | Ben Gradert | Elvis Dhima (a) |
| Litchfield | Kevin Brown | Kim Kleiner (a) |
| Lyndeborough | Mark Chamberlain |
| Mason | Dave Morrison | Sean Pearson |
| Merrimack | Paul Micali (a) | Jerid Pretzer (a) | Dawn Tuomala |
| Milford | Kyle Finnell | Terrey Dolan | Nicole Crawford |
| Mont Vernon | Ben Crosby |
| Nashua | Sam Durfee | Dan Hudson | Wayne Husband | Levent Akinici | Matt Sullivan | Mark Saunders |
| Nashua Transit System | Camille Correa | John Savage (a) |
| Pelham | Jennifer Beauregard |
| Wilton | Nick Germain | John Bukkheygi |
| Federal Highway Administration (FHWA) | Leigh Levine |
| Federal Transit Administration (FTA) | Brandon Burns |
| NH Dept. of Environmental Services (NHDES) | Jack Wade | Mac Bevier |
| NH Dept. of Transportation (NHDOT) | William Rose | Denise Sherburne |