The city always included a belt of irrigated agricultural land including small hamlets. A network of roads and canals connected the city to this land. The transportation network was organized in three tiers: wide processional streets (Akkadian:"sūqu ilāni u šarri"), public through streets (Akkadian:"sūqu nišī"), and private blind alleys (Akkadian:"mūṣû"). The public streets that defined a block varied little over time while the blind-alleys were much more fluid. The current estimate is 10% of the city area was streets and 90% buildings. The canals; however, were more important than roads for good transportation.