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Motorists and bicyclists on the <br />approach to a street must be <br />able to clearly see between <br />trees. <br />3) Street trees should be <br />planted within center medi- <br />ans. Trees planted within the <br />median reduce the perceived <br />width of the street. This <br />guideline does not apply <br />when there is a strong termi- <br />nating view, or in downtowns <br />areas where strong architec- <br />tu ra I features shou Id be <br />allowed to dominate the <br />streetscape. <br />4) Plant street trees in planting <br />strips in areas with less intensive pedestrian and <br />commercial activity, or in tree wells with or <br />without tree grates in areas with more intensive <br />pedestrian and commercial activity. <br />S) Street trees should be of mixed rather than <br />uniform species to reduce the potential for <br />disease killing off whole populations of trees <br />along a street. <br />Tree grates are sometimes <br />used in more urban settings <br />17 <br />Trees planted within median islands reduce the perceived <br />width of the street. <br />