Communities worldwide face diminished infrastructure performance and increased operating and capital costs resulting from unmanaged industrial, commercial, and residential development that impinges on their infrastructure corridors. It is important that planners anticipate and proactively manage land development along the corridors to avoid surprise, regret, and belated action. This paper demonstrates an approach utilizing expert elicitation and geographic data (i) to assess the relative risk of land development adjacent to infrastructure corridors, and (ii) to focus and prioritize corridor sections for risk management. The approach uses several factors to score adjacent properties according to their relative likelihoods of development in a 10-to 20-year horizon. The scores are compared to land values and existing road-access points in order to illuminate the relative costs of risk management along corridor centerlines. The riskmanagement options, including land acquisition, negotiation with developers, and limitations on future access points, are discussed. The approach is germane for risk-based protection of infrastructure corridors of both developed and developing regions of the world, for a range of time horizons, geographic scales, and infrastructure networks.

Economic uncertainties have prompted transportation departments to consider cost-effective spending to reduce funding shortages. Although methods exist for identifying and prioritizing projects, there is need for analysis of long-range plans that consider stakeholder perspectives. This article compares two pairs of cost estimates: (a) modal agency cost estimates with (b) highway-only implementations and (c) regional Transportation Planning Organization (TPO) plans with (d) the state Department of Transportation (DOT) highway plan. This article develops methods to compare the perspectives of cost estimates for transportation improvements. The methods are adaptable to include both preliminary cost data and detailed life cycle cost data. The results aid in the prioritization of engineering and long-range planning efforts for projects that are expected to contribute to the goals of a variety of stakeholder investments. The methods support efforts for increasing accuracy and inclusion of life cycle costs into project estimates and employment of more sophisticated cost methodologies, such as cost-effectiveness and cost–benefit analysis.