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7 <br /> Piedmont Level of Service D Standards <br /> for Minor Thoroughfares * <br /> 55 MPH 1 Lane Per Direction 1 Lane Per Direction WCLTL <br /> Urban Suburban Rural Urban Suburban Rural <br /> 12 foot lanes 12900 14600 15100 14200 15900 16500 <br /> 11 foot lanes 12500 14100 14600 13700 15400 16000 <br /> 10 foot lanes 12000 13600 14100 13300 14800 15400 <br /> 9 foot lanes 11600 13100 13600 12800 14300 14900 <br /> 45 MPH 1 Lane Per Direction 1 Lane Per Direction WCLTL <br /> Urban Suburban Rural Urban Suburban Rural <br /> 12 foot lanes 11700 12200 14600 13100 13200 16000 <br /> 11 foot lanes 11300 11800 14100 12700 12800 15500 <br /> 10 foot lanes 10900 11400 13600 12200 12300 14900 <br /> 9 foot lanes 10500 11000 13100 11800 11900 14400 <br /> 35 MPH 1 Lane Per Direction 1 Lane Per Direction WCLTL <br /> Urban Suburban Rural Urban Suburban Rural <br /> 12 foot lanes 10200 10200 11700 12700 <br /> 11 foot lanes 9900 9900 11300 12300 <br /> 10 foot lanes 9500 9500 10900 11900 <br /> 9footlanes 9200 9200 10500 11400 <br /> 25 MPH 1 Lane Per Direction 1 Lane Per Direction WCLTL <br /> Urban Suburban Rural Urban Suburban Rural <br /> 12 foot lanes 10000 11300 <br /> 11 foot lanes 9700 10900 <br /> 10 foot lanes 9300 10500 <br /> 9 foot lanes 9000 10200 <br /> II <br /> Uses "Principal Arterials" and "Minor Arterials" Facility Types in NCLOS <br /> * Decrease in Lane Width Capacity calculated via 2000 Highway Capacity Manual <br /> lane-width adjustment factor for saturation flow rate <br /> See Appendix El for HCM 2000 Urban Arterial Equations <br /> Use Appendix E3: Piedmont Minor Thoroughfare Inputs for adjustments <br /> NOTE: Lane Width is adjusted downward by 3.33% per less foot of pavement <br /> 16 Updated 10/14/2011 <br />