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 Austin
 Transportation Criteria Manual
 Section 1. VISION, GOALS, AND DESIGN CRITERIA

  § 1.6.0. HIGHWAYS

Latest version.

  • A.

    All highway designs should conform with the State Department of Highways and Public Transportation (SDHPT) Highway Design Division Operations and Procedures Manual and must be approved by the SDHPT District Engineer.

    B.

    The Highway Design Division Operations and Procedures Manual should be consulted for complete design details.

    Table 1-12
    "Alternate" Geometric Design Criteria Summary Table

    Functional Classification TCM Figure ROW Width Paving Width LOG-LOG Median Width FOC-FOC Curb Basis Design Speed (mph) Min Centerline Radius Sidewalk Width
    Local
    SF-1 to SF-2 Zoning 1-45 50 25 - 11 25 180 4
    SF-3 to SF-6 Zoning 1-46 56 33 - 10 25, 30 180 4
    w/o std curb & gutter 1-47 60 24+2** - - 25 180 -
    Collectors
    Residential 1-48 60 37 - 10 30 300 4
    w/o std curb & gutter 1-49 70 26+2** - - 30 300 -
    Neighborhood 1-50 60 37 - 15 30 470 4
    w/o std curb & gutter 1-51 60 28+4** - - 30 -
    Commercial 1-52 70 37 - 15 35 470 6
    w/o std curb & gutter 1-53 70 28+4** - - 35 -
    Industrial 1-54 70 45 - 11 35 470 5
    w/o std curb & gutter 1-55 90 48+4** - - 35 -
    Primary 1-56 75 45 - 13.5 35 470 5
    w/o std curb & gutter 1-57 90 48+4** - - 35 470 -
    Div., 4-lane 1-58 100 2 @ 24 14 - 35, 40 470, 725 5
    Arterials****
    MNR 2
    with ribbon curb WC 1-34C 70 30 - 18.5 40, 45 725, 1000 5
    with ribbon curb BL 1-34D 72 34 - 16.5 40, 45 725, 1000 5
    w/o std curb & gutter 1-34E 74 24 - 17 40, 45 725, 1000 5

     

    Functional Classification Min. Tangent Length between curves Max. Sust'nd Grade (%) Max. Grade <500′ (%) Min Horiz Tang Length Approaching Min. Dis. between Median Opening Desired Min Landing w/Grade <4% Approacing Min Driveway Spacing*, ***
    Loc Col Art Loc Col Art T1 T2
    O U D
    Local
    SF-1 to SF-2 Zoning 50 15 15 50 50 50 - 50 50 80 10 50 50 -
    SF-3 to SF-6 Zoning 50 15 15 50 50 50 - 50 50 80 10 50 50 -
    w/o std curb & gutter 50 15 15 50 50 50 - 50 50 80 10 50 50 -
    Collectors
    Residential 100 11 14 50 50 50 - 80 80 100 25 50 50 -
    w/o std curb & gutter 100 11 14 50 50 50 - 80 80 100 25 50 50 -
    Neighborhood 100 10 13 50 50 50 - 80 80 125 25 50 50 75
    w/o std curb & gutter 100 10 13 50 50 75 - 80 80 125 25 50 50 75
    Commercial 100 10 12 50 75 75 - 80 80 125 25 50 75 75
    w/o std curb & gutter 100 10 12 50 75 75 - 80 80 125 25 50 75 75
    Industrial 100 8 11 50 75 75 - 80 80 125 - 50 75 75
    w/o std curb & gutter 100 8 11 50 75 75 - 80 80 125 - 50 75 75
    Primary 100 10 12 50 75 75 varies 80 100 125 - 50 100 100
    w/o std curb & gutter 100 10 12 50 75 75 varies 80 100 125 - 50 100 100
    Div., 4-lane 100 10 12 50 75 75 varies 80 100 125 - 50 100 100
    Arterials****
    MNR 2
    with ribbon curb WC 150 9 11 - 75 75 - - 125 125 - 75 150 150
    with ribbon curb BL 150 9 11 - 75 75 - - 125 125 - 75 150 150
    w/o std curb & gutter 150 9 11 - 75 75 - - 125 125 - 75 150 150-
    * Special ordinances apply to Principal Roadways and Hill Country Roadways (See Table 5-2)
    ** Width is measured from edge of pavement to edge of pavement and includes shoulder on each side
    *** T1 = Type 1, t2 = Type 2; O = One Way, U = Undivided, D = Divided
    **** MNR = Minor Arterial, MAU = Major Undivided Arterial, MAD = Major Divided Arterial, WC = Wide Curb Lane, BL = Bike Lane
    ***** TWLTL = Two Way Left Turn Lane
    Note: Selection between wide curb lane and bike lane sections should conform to the facility designation for the roadway in the Austin Bikeway Plan