Spain grid pattern:
The existing grid pattern in Spain goes back to 19th century by Lldefon Cerda ( Harvard University 2014). As a designer he consider criteria that make these grid pattern the most sustainable one. Blocks in this grid pattern are similar together. Each of them is rectangular with chamfer in four corners and court yard with garden inside them. Chamfers make intersections vaster, that increase visibility and help to reduce the amount of traffic. Because of court yards each house has two free sides that could increase the amount of sunlight and it let the air to move inside the house as a natural ventilation. Some of these ideas never had come true. For example the hight of blocks are higher now and there are not garden in all of the court yards. Instead of garden some of them have car parking or shopping center. In recent years when a block becomes empty, government occupise that to recreate the garden in court yard.