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Knoxville TPO adopts 4-year Mobility Plan and air-quality conformity finding
Summary
The Knoxville Regional Transportation Planning Organization adopted its updated Mobility Plan and a technical conformity determination that the plan meets federal air-quality requirements, moving both documents to federal review and beginning the next four‑year planning cycle.
The Knoxville Regional Transportation Planning Organization voted April 30 to adopt its updated regional Mobility Plan and an accompanying air-quality conformity determination, a step officials said is required for continued use of federal transportation funds on capacity-increasing projects. "Today is the big day for us to adopt the mobility plan and conformity determination," said Mike Conger, the TPO project lead, summarizing the two‑year effort and the outreach behind it.
The plan, the TPO said, updates the region’s long-range planning framework that the TPO reviews every four years and includes a shorter main document with infographics plus a technical appendix of more than 400 pages. The public comment period closed April 22; staff said 185 people submitted feedback through online interactive maps and comment forms. "We had projects that the public could comment on individual ones," Conger said, adding that most comments favored multimodal projects such as greenways while other projects, like the Pellissippi Parkway extension, drew mixed reactions.
Why it matters: the conformity determination assesses whether the plan’s transportation projects would cause or contribute to violations of the Environmental Protection Agency’s ozone and fine-particulate (PM2.5) standards. TPO staff explained they calculate emissions from mobile sources and compare them to the motor vehicle emissions budgets (MVEBs) set for the region; the presentation reported that projected VOC, NOx and PM2.5 emissions remain below allowable budgets for the plan’s analysis years through 2050.
The conformity finding requires federal review. Conger said the Federal Highway Administration and Federal Transit Administration, in consultation with the EPA, will provide an informal air‑quality conformity finding by May 31; failure to obtain that finding could lead to a conformity lapse that would freeze federal funding for certain projects. "If we cannot demonstrate conformity then our area can enter what is known as a conformity lapse and that could cause federal funding to be frozen for major capacity increasing type projects," Conger said.
Board members and staff emphasized outreach and health links. A public commenter credited the plan and urged officials to tie conformity rules to public health, saying the standards exist to reduce respiratory ailments such as asthma and COPD. Conger and other staff noted long-term improvements in regional air quality, citing reductions in vehicle emissions and cleaner power plant operations as contributing factors.
The TPO’s technical committee recommended adoption; the executive board moved and seconded the resolution and voted in favor. TPO staff said they will forward public comments appended to the plan to technical committee members and continue work on performance measures and an ArcGIS experience for public project tracking.
Next steps: staff will submit the plan and the conformity report for the USDOT agencies’ informal conformity finding by the May 31 deadline; once the agencies issue their letter, the TPO said it will start the next four‑year clock for plan updates.
