Recent advancements in materials like composites, longer-lasting concrete, and high-performance steel are being used in bridge construction. Structural engineers worldwide will meet at a conference in Pittsburgh to discuss new bridge design and construction methods. Louisiana bridge design will be a focus on the first day, with sessions on long-span bridges, innovation, and design on the second day. The third day will cover topics like rehabilitation, strengthening, foundations, seismic activity, construction, and testing.