The U.S. Inflation Reduction Act solidifies both wind and solar as least-cost sources of new generating supply in the United States. At the same time, these resources tend to be in different locations than existing legacy infrastructure, making transmission increasingly important to integrate renewables onto the grid and ensure a reliable, affordable electricity system. New transmission development is often slowed down by complex planning and permitting processes, cost allocation issues and legal challenges—with long interconnection queues and network upgrade costs delaying many new wind and solar resources from coming online. What opportunities and barriers are there to increasing transmission capacity in existing rights of way? What solutions are available to facilitate new transmission development? What are the roles of policymakers versus the private sector?