Kimley-Horn and Associates Inc., a design, engineering and planning firm based in Raleigh, North Carolina, has expanded its footprint in Austin, Texas. Its lease gives Kimley-Horn a larger space at the Campus at Arboretum, an office complex in the popular North Austin area. Large companies are signing office leases and developers are planning new high-rises in the area, making North Austin a destination for retail, office and residential uses.