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US 1/MD 201 Corridor Study Secondary and Cumulative Effects Analysis Reports, Maryland

A. Morton Thomas and Associates, Inc. (AMT) performed preliminary engineering analyses for a range of highway improvement alternatives considered along a 4.5 mile segment of MD 201 and conducted the Secondary and Cumulative Effects Analysis (SCEA) based on the improvements to the US 1 and MD 201 corridors. US 1 and MD 201, two parallel arterial corridors north of the Capital Beltway serve as both primary commuter routes and local access for businesses and communities, and function as alternative routes to I 95 and/or the Baltimore Washington Parkway. The goal of the US 1/MD 201 project is to relieve traffic congestion, support planned economic development, improve vehicular, transit, bicycle, and pedestrian circulation, and enhance safety. The project evaluated a wide range of alternatives from widening to new alignments to Transportation System and Demand Management Strategies. The project area included numerous environmentally sensitive and historical sites. A strong public involvement process including multiple public meetings and a Public Task Force was an integral component of the project.

Key tasks included the following:

Development of Highway Alternatives (Stage 1): Geometrics developed baseline of existing road and proposed centerline to minimize impacts and overall costs of widened roadway. Placed alignment to new section of roadway to meet proposed connector points and minimize earthwork quantities. Typical sections designed to accommodate adequate sidewalk width, standard lane widths and shoulder width for bicycle facility. Major intersections layout of intersections to add turn lanes and storage lengths. Preliminary impacts assessment set right-of-way line and determined impacts to properties, structures and environmental features. Preliminary cost estimates utilized standard cost estimate forms to complete cost per mile project planning estimate of proposed road work.

Alternates Public Meeting: Prepared meeting materials including wall displays and handouts, and provided project information to meeting attendees.

Secondary and Cumulative Effects Analysis (SCEA): Secondary and cumulative effects have not been typically considered in the development process because they are difficult to directly observe or measure. As growth continues, examining development projects within the context of other development in the surrounding area has become an increasingly important aspect in the goal to protect and enhance the human environment. AMT's analysis included extensive interviews with local planning agencies; historic and future trends analysis on population, land use and development, and ; Secondary and Cumulative Effects analyses on social and economic and natural environments, resulting in identification of potential effects and factors that would minimize these impacts. The approved SCEA boundary including three counties, was comprised of 56,000 acres, and 27 transportation and land development projects were considered in the analysis which spanned the time frame form 1960 - 2020.

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