Welcome to Plan Bay Area 2040, an updated long-range Regional Transportation Plan and Sustainable Communities Strategy for the nine-county San Francisco Bay Area. This document discusses how the Bay Area will grow over the next two decades and identifies transportation and land use strategies to enable a more sustainable, equitable and economically vibrant future. Starting with the current state of the region, this document describes Play Bay Area 2040 and its goals, a proposed growth pattern and supporting transportation investment strategy, and key actions needed to address ongoing and long-term regional challenges. Plan Bay Area 2040 is a limited and focused update of the region's previous integrated transportation and land use plan, Plan Bay Area, adopted in 2013.