The Massachusetts Department of Transportation’s Separated Bike Lane Planning & Design Guide presents considerations and strategies for the development of separated bike lanes. The Guide provides a framework for determining when separated bike lanes are appropriate and feasible. It presents design guidance for separation strategies, bike lane configuration, and considerations for transit stops, loading zones, utilities, drainage, parking and landscaping. The Guide defines separated bike lane design principles for intersections, introduces intersection design treatments and provides examples of typical intersection configurations. It clarifies when to consider signalization and provides guidance on signal phasing and timing as well as location of signal equipment. The Guide concludes with maintenance strategies, including seasonal operations and maintenance considerations.