NVTA committee reviews TransAction draft, clarifies emissions assumptions and next steps

Northern Virginia Transportation Authority staff on Tuesday briefed a committee on proposed edits to the draft TransAction long-range multimodal plan, seeking final feedback ahead of a request for committee endorsement in mid-November and Authority adoption in December.

The presentation, given by staff presenter Mr. Jasper, said TransAction is a horizon-year 2045 plan that includes 429 candidate multimodal projects and that the plan is fiscally unconstrained and geographically unconstrained by design. "TransAction is fiscally unconstrained, which means that it intentionally includes more projects than could be reasonably funded by the region," Jasper said. He added that inclusion in the plan does not commit the Northern Virginia Transportation Authority (NVTA) to fund any specific project.

Committee members focused most sharply on how the draft presents emissions results and how much of an emissions change the plan can legitimately claim. The draft included a model result that showed a 54% decrease in tailpipe emissions under one scenario, but staff said that figure depends on strong, regionwide assumptions about electrifying buses, heavy trucks and light-duty vehicles. "TransAction includes three region-wide projects related to electrifying vehicles," said Dalia, an NVTA analyst, and "built off of those assumptions...we said if that electrification takes place ... then that results in a 54% decrease in tailpipe emissions." She added that the 54% figure is the result of a specific electrification assumption set and that the same analysis under a different set of assumptions produced a 1.7% increase in emissions.

The committee asked staff to make the presentation clearer about which assumptions drive the extreme results and to remove or better explain the single-bar chart that many reviewers misinterpreted as a definitive NVTA claim. "That bar has caused unintended consequences in terms of interpretation," Jasper said. Staff proposed removing the single-bar display from the executive visuals and adding clearer text and a boxed explanation that the 54% outcome is scenario-dependent and does not represent an NVTA-guaranteed outcome.

Staff summarized other technical and public-engagement items: the draft divides costs by mode (transit projects total about $44.5 billion; roadway intersections/interchanges/HOV/parking combined are a separate, larger category; non-motorized projects total about $1.5 billion; technology and travel-demand-management projects are just under $1 billion). The plan also highlights a proposed regional bus-rapid-transit (BRT) network and includes technology measures to support decarbonization and travel-demand strategies.

Public comment summary: staff reported 223 comments from roughly 201 individuals this cycle, compared with more than three times that many five years earlier. Staff said some comments were coordinated: about two dozen commenters submitted negative feedback focused on one Prince William County project, accounting for about 10% of total comments. Committee members asked for a clearer breakdown of effects for projects wholly or partially outside Northern Virginia; staff said some projects lie outside the NVTA legal funding area but were included because they affect travel patterns for Northern Virginians and could be eligible for funding only if cost-sharing arrangements acceptably span jurisdictions.

Timing and next steps: staff told the committee they will revise explanatory text and charts, correct three duplicated project entries, tidy a few project sponsor/location records, and remove projects that have since moved into the baseline/no‑build because they are now funded or under construction. Staff said the final draft will be circulated to committee members at least one week before the scheduled November 16 meeting, when the committee will be asked to endorse the plan for NVTA adoption in December.

Votes at a glance: the meeting recorded a routine approval of minutes earlier in the agenda (motion carried, recorded as "Aye" and "Carry 9"), and the meeting ended on a motion to adjourn that was approved (tally not specified). No formal votes on TransAction were taken at this briefing.

Why it matters: TransAction is NVTA's long-range plan and, by statute, projects generally must be in that plan to be eligible for NVTA regional revenues in future funding cycles. Committee members said clearer communication is required so jurisdictions and the public understand the difference between (a) a needs-based, fiscally unconstrained project list, (b) the region's funding program, and (c) scenario-dependent modeling results.

The committee will reconvene in November with a revised draft and staff-supplied clarifications on emissions, scenario presentation, and the interactive project map that staff described as an online tool for exploring project details.