Improved Streets
	An increase of 55% (1,405 improved lane miles) in 23 years from 1980 to 2003:
	The reason for this increase is the annexation of Multnomah County roads within the City limits.
	Over the last 10 years, the system size has grown 1% per year
	The inventory is comprised of the following types of streets:
	1980   2003   Change:
	Hard Surface  2,315   3,764   63%
	Oil Gravel         231      187   -24%
	Total      2,546   3,951   55%