This section shows how drainage, open space, and circulation are handled within the courtyard housing neighbourhoods. Here, large plantings of vegetation between blocks become important wildlife and recreation corridors, while crushed, recycled concrete and peat deposits below the surface assist in restoring the site's hydrologic function. Rooftop cisterns and planting beds store and recycle rainwater. Excess water is channeled to the interior courtyards, where it percolates into the soil naturally or through perforated pipes buried beneath the surface. Streets are narrow, about eight metres, and allow two lanes of traffic with tow lanes of visitor parking. Resident parking is provided underground.