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Coastal Level of Service D Standards 110 <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 15100 15800 16400 16600 17200 17800 <br /> 11 foot lanes 14600 15300 15900 16100 16600 17200 <br /> 10 foot lanes 14100 14700 15300 15500 16100 16600 <br /> 9 foot lanes 13600 14200 14800 14900 15500 16000 <br /> 45 MPH 1 Lane Per Direction 1 Lane Per Direction WCLTL <br /> Urban Suburban Rural Urban Suburban Rural <br /> 12 foot lanes 12700 13300 14600 14200 14300 16000 <br /> 11 foot lanes 12300 12900 14100 13700 13800 15500 <br /> 10 foot lanes 11900 12400 13600 13300 13300 14900 <br /> 9 foot lanes 11400 12000 13100 12800 12900 14400 <br /> 35 MPH 1 Lane Per Direction 1 Lane Per Direction WCLTL <br /> Urban Suburban Rural Urban Suburban Rural <br /> 12 foot lanes 10500 11000 11500 13700 <br /> 11 foot lanes 10200 10600 11100 13300 <br /> 10 foot lanes 9800 10300 10700 12800 <br /> 9 foot lanes 9500 9900 10400 12300 <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 /> 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 E1 for HCM 2000 Urban Arterial Equations <br /> Use Appendix E2: Coastal Minor Thoroughfare Inputs for adjustments <br /> NOTE: Lane Width is adjusted downward by 3.33% per less foot of pavement <br /> 15 Updated 10/14/2011 <br />