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SDDOT / Road Design / What's New 11/3/2008 Section B - Grading standard notes have been updated. On sheet B15, an alternate mix design was added to the CONTROLLED DENSITY FILL FOR PIPE note. Instructional pink colored text was also added. On Sheet B20, the DWT (Detectable Warning Tile) made by 3D Traffic Works was added to the list of approved products for the Type 2 Detectable Warning. You can see the updated file here.

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