HB2450 creates the “Subterranean Transportation Infrastructure Coordination Act,” a new framework for planning, permitting, constructing, operating, and regulating underground transportation tunnel projects in Tennessee. The bill defines a “transit project” as a subterranean tunnel or tunnel system primarily for intrastate passenger or goods movement using electric, autonomous, low-emission, or other emerging vehicle technology, and expressly excludes traditional rail or other state-highway-right-of-way mass transit projects. It establishes statewide coordination bodies, including a governor’s infrastructure coordination council and a subterranean transportation infrastructure coordination authority, to streamline review and resolve disputes among state agencies, local governments, utilities, and operators.
The bill shifts most regulatory control over subsurface construction to the state and the new authority, while preserving local jurisdiction over surface construction in limited circumstances. It gives the state fire marshal permitting, inspection, and enforcement authority for subsurface construction, preempts local permitting for underground work, and limits local governments from adopting zoning, land-use, or building rules that would prohibit or effectively prohibit a transit project. It also creates detailed procedures for legal descriptions, recording project boundaries, utility coordination, emergency response protocols, condemnation of certain local public property interests, and an appeals process culminating in de novo review by a three-judge panel.
HB2450 also addresses utility relocation and cost allocation, requiring operators to pay actual costs for relocating or protecting utility infrastructure unless otherwise agreed, while limiting what utilities can charge and allowing appeals of adverse utility decisions. The bill provides that operators are responsible for taxes applicable under existing law, creates a transit project fund to support administration and related expenses, and includes provisions intended to preserve federal funding. It also amends related statutes to bar local governments from prohibiting autonomous vehicles used in connection with a transit project and to ensure those projects are treated consistently under state law.
The overall sentiment in committee was generally favorable, as reflected by repeated “rec for pass” votes at each stage and relatively strong margins in the later committees. At the same time, the votes were not unanimous, suggesting some concern about the bill’s scope and its effect on local control, permitting authority, and land-use regulation. The bill’s structure indicates a strong policy preference for centralized state oversight and expedited project delivery, which likely drove both support from infrastructure and economic-development interests and caution from members concerned about local government authority and regulatory preemption.
The main points of contention appear to be the bill’s broad preemption of local zoning, building, and permitting authority; the authority granted to the new state entity to resolve disputes and, in some cases, condemn local public property interests; and the extent to which private operators are insulated from local delay. Utilities and local governments are also directly affected because the bill sets timelines, limits cost recovery, and allows appeals of utility decisions. Supporters likely viewed the bill as a way to attract private capital and expand transportation capacity, while critics likely focused on the loss of local discretion and the potential for state-level override of local planning and infrastructure decisions.
The bill adds a new chapter to Title 65 governing subterranean transportation infrastructure and amends related provisions in Titles 20, 55, and 4. It creates new state bodies, assigns permitting and inspection authority for underground transit projects to the state fire marshal, preempts conflicting local regulation for subsurface construction, limits local zoning and land-use barriers, and establishes a statewide appeals and dispute-resolution process. It also affects local governments, utilities, operators, and state agencies by setting review deadlines, cost-allocation rules, condemnation procedures, emergency-response authority, and recording requirements for tunnel projects.
Committee action was broadly supportive, with the bill advancing through multiple committees by comfortable margins and no recorded committee opposition large enough to stop it. The pattern of votes suggests the measure was viewed as a serious infrastructure and economic-development proposal rather than a purely symbolic one. However, the presence of several dissenting votes at each stage indicates some unease about the bill’s breadth, especially its preemption of local authority and the creation of a powerful new state framework for private underground transit projects.
The most notable contention centers on state preemption versus local control. Local governments lose authority over subsurface construction and are barred from using zoning, land-use, building, or safety rules to block or materially delay a project, while the new authority can override denials and set lease terms or pursue condemnation of certain local public property interests. Utilities may also object to the bill’s limits on cost recovery and its appeal process for adverse utility decisions. Supporters emphasize streamlined permitting, private investment, and transportation capacity; opponents are likely to focus on reduced local discretion, potential impacts on public property, and the concentration of decision-making in a new state authority.