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I 5- G.5 G' 11' 12' 11' G' 6.5' -5'
BIKE LANE THRU LANE CONTINUOUS TURN LANE THRU LANE BIKE LANE SIDEWALK
46' -
Vecting of DHv
e �
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NOT TO SCALE
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5' ---6 9' -5' 11' 1' 10' 1' 11' 5' 9' 5
SIDEWALK PARKING BIKE THRU LANE MEDIAN THRU LANE BIKE PARKING SIDEWALK
LANE LANE
1
62'
Vcetrng
Street
\ort
of
Abb ington e rive
This cross section is desired by Albemarle County and will be
2;*
provided at final plan design, pending county resolution of
VDOT's policy that onstreet parking must be restricted within
300 ft. of a roundabout.
NOT TO SCALE
A-1 3
GEOMETRIC DESIGN STANDARDS FOR URBAN COLLECTOR STREET SYSTEM (GS -7)
(11) (3) ( (
DESIGN MINIMUM STOPPING MIN. STANDARD BUFFER (4) 5 NEW AND
SPEED RADIUS SIGHT WIDTH CURB & STRIP MINIMUM () RECONSTRUCTED
(MPH) DISTANCE OF GUTTER WIDTH SIDEWALK SLOPE MINIMUM
LANE WIDTH BRIDGE WIDTHS AND
(10) VERTICAL CLEARANCES
U ULS MIN.
STREETS 50 929' 425' 12' CG-7
WITH 45 732' 795' 360 SAME AS CURB TO CURB
CURB & 40 563' 593' 305' (1) (2) (10) 5' 2 ' 1 OF APPROACHES
GUTTER 11' CG -6
30 300' 273' 200'
STOPPING (7) (10) (8) (9)
MINIMUM MIN. MINIMUM WIDTH NEW AND
DESIGN SIGHT WIDTH (
RADIUS WIDTH GRADED RECONSTRUCTED
SPEED DISTANCE SHOULDERS OR DITCH SLOPE MINIMUM
(MPH) LANE (FRONT BRIDGE WIDTHS AND
FILL CUT SLOPE)
U ULS MIN. W /GR & FILL VERTICAL CLEARANCES
STREETS 50 929' - 425' 12' . 8' + PAVEMENT
WITH 11' 8' 6 WIDTH + 8'
SHOULDER 40 563' 593' 305' (1) (2) 2:1
DESIGN 30 300' 273' 200' 11 ' 7' 4' 4' 4' + PAVEMENT WIDTH + 4'
GENERAL NOTES FOOTNOTES
A minimum design speed of 30 mph or higher should be used for (1) 12' when Design year ADT exceeds 2000. Where
collector streets, depending on available right of way, terrain, feasible, lanes should be 12' in industrial areas; however,
adjacent development and other area controls. where available or attainable RAW imposes severe
limitations, 10' lanes can be used in residential areas,
In the typical street grid, the closely spaced intersections usually limit based upon design speed and traffic volumes. (See
vehicular speeds and thus make the effect of design speed of less AASHTO Green Bk., Exhibit 6 -5).
significance. Nevertheless, the longer sight distances and curve radii 11' lanes can be used in industrial areas.
commensurate with design speeds higher than the value indicated
result in safer highways and should be used to the extent practicable. (2) Lane width to be 12' at all interchange locations.
Standard TC -5.01 U (Urban) (2001 ASSHTO Green Book) (3) Or equivalent City or Town Design.
superelevation based on 4% maximum.
(4) 8' or more may be needed in commercial areas.
Standard TC- 5.04ULS (Urban -Low Speed) (2004 ASSHTO Green
Book) superelevation based on 2% maximum may be used with a (5) 3:1 and flatter slopes may be used when right of way is
design speed of 45 mph or less. behind the sidewalk (or sidewalk space) in residential or
other areas where the slopes will be maintained by the
A minimum 30' width of surfacing or a minimum 30' curb to curb is to property owner.
be used within incorporated cities or towns to qualify for maintenance
payments. (6) Ditch slopes to be 4:1 - 6' width and 3:1 - 4' width.
Clear zone and Recoverable Area information can be found in (7) When Design year ADT exceeds 2000 VPD, with greater
Appendix A, Section A -2 of the Road Design Manual. than 5% total truck and bus usage: Provide 4' wide paved
shoulders when the graded shoulder is 5' wide or greater
RELATIONSHIP OF MAXIMUM GRADES TO DESIGN SPEEDS or provide 3' wide paved shoulders when the graded
shoulder is 4' wide. All shoulders not being paved will
DESIGN SPEED (MPH) have the mainline pavement structure extended 1', on the
TYPE OF same slope, into the shoulder to eliminate raveling at the
TERRAIN 30 40 45 50 pavement edge. (See Standard GS -11 for shoulder
GRADES (PERCENT) design).
LEVEL 9 9 8 7 (8) Where the approach roadway width (traveled way plus
shoulder) is surfaced, that surfaced width shall be carried
ROLLING 11 10 9 8 across all structures if that width exceeds the width shown
in this table.
MOUNTAINOUS 12 12 11 10
(9) Vertical clearance at roadway underpasses for new and
Maximum grades of short lengths (less than 500 ft.) and one -way reconstructed bridges is to be 16' -6" desirable and 14' -6"
down grades may be 2% steeper. minimum (1' additional clearance required for non -
vehicular overpasses).
FIGURE A - 1 — 7*
(10) For buffer strip widths see HM— LD-55.
(11) For intersection sight distance requirements see
Appendix C, Table C -1 -5.
* Rev. 7/09