Climate‑driven transport bill advances amid sharp debate over costs and rural impacts
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Summary
SB 59 would require MDOT to assess greenhouse‑gas and vehicle‑miles‑traveled impacts of major projects and to incorporate mitigation or design changes for large expansions. Environmental groups and planners urged a favorable report; construction and rural stakeholders warned of delays, higher costs, and disproportionate impacts on preservation programs.
Sen. Shelley Hettleman told the Budget and Taxation Committee that the Transportation Climate Alignment Act (SB 59) would make Maryland’s major transportation investments more consistent with the state’s greenhouse‑gas reduction goals by requiring MDOT to evaluate CTP projects for climate and vehicle‑miles‑traveled impacts.
"This bill requires MDOT to evaluate major projects in a Consolidated Transportation Program for their impacts on climate pollution and vehicle traffic," Sen. Hettleman said. She described two core elements: a program‑level review of the CTP for progress toward targets and a project‑level impact assessment for highway expansions over $100 million, with requirements to incorporate multimodal and demand‑management strategies when projects are expected to increase emissions.
The bill drew broad support from environmental and policy groups. "The TCA will ensure that our state's biggest investments are actually delivering better outcomes for Maryland residents," said Casey Hunter of the League of Women Voters of Maryland. RMI’s Miguel Moravec cited examples in other states, saying the approach can free money for preservation and transit; he told senators that one analysis projects Maryland could save roughly $550 million a year on average by prioritizing projects that move more people per dollar.
MDOT testified the department supports the bill with implementation amendments, including a phased start for project‑level assessments to allow modeling improvements. MDOT said it has been coordinating with the sponsor and stakeholders since 2024 and recommended delaying some requirements to ensure the state can produce defensible modeling.
Opponents, including trade associations and contractors, warned that tying mitigation or offsets to individual projects without dedicated funding could delay construction, raise costs, and disproportionately penalize rural and preservation‑focused programs that score poorly in a benefits‑per‑cost framework. "In rural regions, transit does not reduce vehicle miles traveled associated with freight, emergency access, agriculture, or long‑distance commuting," Megan Owings of the Maryland Asphalt Association testified.
Committee members pressed MDOT and proponents on the choice of metrics, the modeling timeline, and whether project‑level triggers would be properly scoped to avoid unintended consequences. The department said additional implementation time would allow it to calibrate the model for large projects and propose mitigation that fits each project's context.
Supporters said the bill is consistent with the governor’s executive order on climate and with practices in other states that prioritize multimodal and lower‑carbon solutions. Opponents urged additional pilot testing and the release of complete pilot datasets before statutory codification.
The transcript records extensive oral testimony and questions but does not show a final committee vote during the hearing.
