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Coastal Level of Service D Standards 105 <br /> for Other Major Thoroughfares * <br /> 55 MPH 2 Lanes Per Direction 2 Lanes Per Direction WCLTL <br /> Urban Suburban Rural Urban Suburban Rural <br /> 12 foot lanes 30400 31600 32800 33300 34500 35700 <br /> 11 foot lanes 29400 30600 31700 32200 33400 34500 <br /> 10 foot lanes 29400 29500 30600 31100 32200 33300 <br /> 9 foot lanes 27400 28400 29500 30000 31100 32100 <br /> 45 MPH 2 Lanes Per Direction 2 Lanes Per Direction WCLTL <br /> Urban Suburban Rural Urban Suburban Rural <br /> 12 foot lanes 26700 27600 29300 29000 29900 32000 <br /> 11 foot lanes 25900 26700 28300 28000 28900 30900 <br /> 10 foot lanes 25000 25800 27300 27100 27900 29900 <br /> 9 foot lanes 24000 24800 26400 26100 26900 29000 <br /> 35 MPH 2 Lanes Per Direction 2 Lanes Per Direction WCLTL <br /> Urban Suburban Rural Urban Suburban Rural <br /> 12 foot lanes 22200 25500 24300 28100 <br /> 11 foot lanes 21500 24700 23500 27200 <br /> 10 foot lanes 20700 23800 22700 26200 <br /> 9 foot lanes 20000 23000 21900 25300 <br /> 25 MPH 2 Lanes Per Direction 2 Lanes Per Direction WCLTL <br /> Urban Suburban Rural Urban Suburban Rural <br /> 12 foot lanes 22100 24200 <br /> 11 foot lanes 21400 23400 <br /> 10 foot lanes 20500 22600 <br /> 9 foot lanes 19900 21800 <br /> Uses "Principal Arterials" Facility Type 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 D1 for HCM 2000 Urban Arterial Equations <br /> Use Appendix D2: Coastal Major Thoroughfare Inputs for adjustments <br /> NOTE: Lane Width is adjusted downward by 3.33% per less foot of pavement <br /> and rounded to the nearest hundred <br /> 10 Updated 10/14/2011 <br />