Urbanisation in the USA and Australia

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Across
  1. 3. where more than 80 % of Australia's population live
  2. 5. cities that enable commuters to travel to work by car
  3. 7. the spread of people across the land
  4. 8. an extremely large city
  5. 9. a large town on the eastern coast of the USA
Down
  1. 1. the unplanned expansion of cities into surrounding arable land
  2. 2. the uncontrolled growth of urban areas
  3. 4. the number of people per square kilometer
  4. 5. the merging together of a number of cities
  5. 6. a person who has to travel long distances to work