H. Peter Seidel is an architect and urban planner known for several notable projects: (1) the Midtown Pedestrian Study for NYC advocating a differentiated grid for dense streets; (2) revisions to the zoning for the 58-block Upper East Side Historic District enabling new buildings; (3) helping shape the Downtown Development Framework and station area plans for LA's new Metrorail system. Seidel's projects promote pedestrian connectivity, urban integration, and sustainable urban design.