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Baltimore-Washington Parkway Widening Feasibility Study

Baltimore-Washington Parkway Widening Feasibility Study

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<strong>Baltimore</strong>-<strong>Washington</strong> <strong>Parkway</strong> <strong>Widening</strong> <strong>Feasibility</strong> <strong>Study</strong>Table of Contents5.2 Methodology ............................................................................................................................... 435.2.1 Limitations of the Transportation Analysis ............................................................................. 435.2.2 Travel Demand Modeling ...................................................................................................... 445.2.3 Constrained Long Range Plan Projects ................................................................................... 445.3 Alternatives Analysis .................................................................................................................... 455.3.1 Existing Conditions Scenario .................................................................................................. 455.3.2 2040 No-Build Scenario ......................................................................................................... 465.3.3 2040 Partial-Build Scenario ................................................................................................... 465.3.4 2040 Full-Build Scenario ........................................................................................................ 475.4 Analysis Results............................................................................................................................ 475.4.1 Traffic Volumes ..................................................................................................................... 475.4.2 Operations ............................................................................................................................ 496.0 Physical Constraints ......................................................................................................................... 546.1 Approaches to <strong>Widening</strong> .............................................................................................................. 546.2 Potential Impacts ......................................................................................................................... 546.3 Preliminary Costs ......................................................................................................................... 576.3.1 Capital Costs ......................................................................................................................... 576.3.2 Right of Way Costs ................................................................................................................ 596.3.3 Operations and Maintenance Costs ....................................................................................... 596.3.4 Construction Costs for Park Aesthetics .................................................................................. 597.0 Environmental Effects ...................................................................................................................... 607.1 Environmental Resources............................................................................................................. 607.1.2 Land Uses .............................................................................................................................. 607.1.3 Forest Areas .......................................................................................................................... 617.1.4 Natural Environmental Resources ......................................................................................... 617.1.5 Cultural and Historic Resources ............................................................................................. 627.1.6 Communities and Community Features ................................................................................. 637.1.7 Wetlands .............................................................................................................................. 637.2 Impacts ........................................................................................................................................ 637.2.1. Parklands and Recreation Areas Impacts .............................................................................. 64iii November 2012

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