Transportation & the Environment: Description and Review of Alternative Policies for Departmental Consideration

Radin, Sari; Crossett, Joe; Birch, Gary; Amegashie, Carolyn · 1994 · ROSA P / Wisconsin. Department of Transportation

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Summary

This 1994 report by the Wisconsin Department of Transportation (WisDOT) addresses the complex relationship between transportation systems and environmental protection within the context of the TRANSLINKS 21 statewide multimodal planning process. The document was motivated by the need to integrate environmental considerations into long-range transportation planning, driven by continued travel growth, increased public awareness of environmental issues, and evolving legal constraints. The primary objective is to define WisDOT’s role in mitigating transportation’s impact on four key environmental issue areas: air quality, the physical environment (including biodiversity, water, and waste), energy efficiency, and global climate change. The report employs a descriptive and analytical framework to evaluate transportation’s environmental impacts across three phases: production of vehicles and infrastructure, operation of the transportation system, and disposal of materials. It reviews trends such as the 138 percent growth in vehicle miles traveled (VMT) in Wisconsin between 1960 and 1990, alongside technological improvements that have reduced per-mile emissions. The analysis is constrained by an examination of federal and state legal requirements, including the Clean Air Act, Clean Water Act, and the National Environmental Policy Act. Based on this review, the authors propose four alternative "environmental strategy packages" that define varying levels of departmental commitment: Alternative One (Compliance), which limits action to legal mandates; Alternative Two (Active Role), which reacts to public expectations and emerging issues; Alternative Three (Aggressive Role), which proactively minimizes unregulated impacts; and Alternative Four (Dominant Role), which prioritizes environmental concerns as the determining factor in transportation policy. Key findings indicate that while total emissions from mobile sources are declining due to effective federal mandates and vehicle technology improvements, Southeastern Wisconsin remains in nonattainment for ozone standards. The report highlights that highway modes constitute the majority of travel and thus the largest source of pollution, though rail and vessel transport emit less per ton-mile than trucks for certain pollutants. Regarding the physical environment, the report identifies infrastructure development as the primary driver of habitat fragmentation, loss of prime agricultural land, and wetland loss. It notes that low-density suburban development, fostered by transportation infrastructure, increases automobile dependence and trip lengths, exacerbating environmental impacts. The significance of this report lies in its establishment of a structured decision-making framework for WisDOT to balance mobility goals with environmental sustainability. By presenting distinct alternative roles, the document allows policymakers to choose a strategic posture ranging from minimal compliance to environmental dominance. It underscores the necessity of mainstreaming environmental considerations into early-stage planning and budgeting processes, rather than addressing them only at the project level. This approach aims to harmonize transportation needs with environmental protection, ensuring that future infrastructure decisions support both economic growth and the preservation of Wisconsin’s natural resources.

Key finding

The Wisconsin Department of Transportation evaluated four alternative environmental roles, ranging from compliance with existing regulations to a dominant role where environmental concerns determine major transportation policy and planning decisions.

Methodology

review

Provenance

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• regulatory evaluation