Studies & Reports - The Purple Line

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Studies & Reports

Throughout the Purple Line Study, the Project Team has conducted numerous studies and produced various reports. All of these studies and reports are vital to understanding all the potential benefits and impacts of the proposed Purple Line. These project documents are used to help aid in the decision-making process for how to proceed with the project.

The longest and most comprehensive study is mandated by the National Environmental Policy Act of 1969 (NEPA) and the Section 106 of the National Historic Preservation Act. These acts require any project using federal money to consider the environmental impacts of the project. The consideration of the impacts results in the publishing of the Alternatives Analysis/Draft Environmental Impact Statement (AA/DEIS). Click here to learn more about what an AA/DEIS is!

	Since 2003, the Purple Line Project Team has worked on their Alternatives Analysis/Draft Environmental Impact Statement (AA/DEIS). As part of the AA/DEIS process the Project Team studied the benefits and impacts of all the alternatives under consideration. The AA/DEIS was completed and released in October 2008. Click here to read the AA/DEIS or any of the corresponding Technical Reports.
	The project team compiled a general summary of the comments that were heard during the AA/DEIS comment period. Click here to see what elected officials, community associations and community members said about the Purple Line AA/DEIS. Please note that a more detailed summary and responses to the comments will be included in the Final Environmental Impact Statement.
	Additionally, there are smaller studies that the project team continues to conduct. These studies are completed due to requests by a community or just due to issues that arise that need further analysis and consideration. These reports are a part of the study process. Please click here to view these additional studies that have been completed.
	MTA is committed to a transparent process for developing the Purple Line, and invites review of the reports and documents developed by the project. MTA has developed a comprehensive portfolio of technical reports, planning documents, travel forecast scenarios, capital / operating cost estimates, management plans, and a financial plan that meet FTA requirements for eligibility for federal funding.