NMD Road  Designation Maintenance responsibility Street Design Criteria Application Description
Max. design speed (mph) Traffic flow Total number of lanes Paved width min.  fc-fc      (ft)  Lane width     (ft) Bike lane width    (ft) Parking lane width (ft) Planted median min. width (ft) Planting strip min. width    (ft) Sidewalk minimum              width Curb Rght-of-way min. width (ft)     (note "I")
Residential  (ft) Commercial (ft)
Boulevard Public   or Private 30 2-way 4 Varies 11 - 12 4 6 6 6 5 12 - 18 Y Varies Centers and where a "seam" is created between adja-cent neighborhoods Multi-lane thoroughfare that may include a center median to create linear park appearance.  Bike lanes are generally provided.  Parking lanes may be separated from the travel lanes with medians on both sides.  See notes A and B.
Avenue Public   or Private 25 2-way 2 DRAFT
40 - 44
10 - 12 4 6 6 6 5 12 - 18 Y 64 - 68 Centers and General Areas Two-lane thoroughfares that connect to important places/spaces in the Center, may serve mixed use areas, function as a "main" street or secondary to a "main" street.  Parking lanes are provided and diagonal parking may be allowed with the appropriate width.  Bikes lanes are generally provided unless determined not applicable.  Avenues may include a center median to create linear park appearance.  See notes A, B and C.
Street Public   or Private 20 - 25 2-way 2 30 - 32 na 4             (C) 6                (D) na 6 5 na Y 54 - 56 Edge, General Areas, Centers & Transitions from residential to mixed-use areas Neighborhood "Street"; local slow-movement thoroughfare that is urban in character and the street is considered a "shared" space.  On-street parking is permitted (intermittent or delineated).  See notes A, C, and D.
Lane Public   or Private 20 2-way 2 22 (pking one side)         ------------   28 (pking two sides) na na na na 6 5 na Y 46 - 52 Edges and General Areas; on limited basis in Centers Narrow very slow-traffic street where "yield" movements intended and the street is considered a "shared" space.  Intermittent on-street parking is permitted.  See notes A, E, F, G and H. 
Alley - Residential Private na 2-way 1 12 na na na na na na na N 20 Edges and General Areas Narrow accessways at the rear of residential lots to garages or designated parking; "yield" movements intended.  Right-of-way or easement width reductions may be considered in accordance with Code 14-512F.  The base-stone of the driving surface shall be extended at least 12" beyond edge of pavement to prevent edge failure;  further extension to support the shoulder areas is recommended.
Alley - Commercial Private na 2-way 1 18 na na na na na na na Y 20 Centers Narrow accessways at the rear of lots to service areas; "yield" movements intended.  Accessways are curbed unless pavement extends to the walls of adjacent structures.
Limitation Notes:                             Definitions:  
A.  The characteristics of the urban streetscape and influence of pedestrian/bike traffic will encourage slow speeds.           Shared Space  
B.  Commercial sidewalk street trees are planted within tree grates in lieu of planting strips.               street width is shared by vehicles, bicycles and pedestrians.
C.  Streets with adt > 3000 shall delineate bike lanes and parking lanes (based on "DISC - Final Report").  Under 3000 adt the street is "shared space".        
D.  The parking lane width on "Streets" where striping is applicable (per "C") or desired.               Center, General, and Edge Areas -  
E.  May be accepted as a public street if 3rd offstreet parking space is accommodated.               Elements of the neighborhood model that comprise the "Transect Concept"
F.  Shall terminate at a "T" intersection, with a higher category street, within no more than 2 continuous blocks.           and are described in detail in "The Development Area Initiatives Project -
G.  Block lengths shall be as follows for each NMD area:  Center 200' - 300' ;  General Areas 300' - 400' ;  Edge Areas 400' - 600'.          Volume 1 of the Final Report",  Section 3,  "Fitting the Pieces Together"  
H.  At intervals not exceeding 200 ft., hydrants, alley or share driveway entrances, or other "no parking" areas will be matched on both sides of the        (pgs. 29 - 36).  
      street to assure a 20 ft. wide zone to operate fire/emergency equipment.                    
I.   The minimum right-of-way width is measured to a point 12 inches behind residential area sidewalks and 12 feet from the face of        Intermittent On-street Parking -
     curb along commercial area sidewalks.                       On-street parking that is not required by Code and is random and discontinuous 
                            along one or both sides of the street.

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