From the 1940s, Riyadh mushroomed from a relatively narrow, spatially isolated town into a spacious metropolis. When King Saud came to power, he made it his objective to modernize Riyadh, and began developing Annasriyyah, the royal residential district, in 1950. Following the example of American cities, new settlements and entire neighborhoods were created on grid plans, and connected by high-capacity main roads to the inner areas. The grid pattern in the city was introduced in 1953. The population growth of the town from 1974 to 1992 averaged 8.2 percent per year.