The landscape architecture firm working on a new master plan for Memorial Park is proposing to put portions of Memorial Dr. in tunnels to allow better connections between the long-separated north and south sections of the 1,500-acre space. Drawings shown at a public meeting Wednesday demonstrated a range of strategies Nelson Byrd Woltz is considering to link some of the 24 separate sections of the park so that they are freely accessible to visitors without hazarding traffic. Tunnels over the existing roadway would be covered by an 800-ft. long “land bridge” planted with grass and trees, reports the Chronicle‘s Molly Glentzer: