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CARE OF: ALLAN SCHUCK
DEPARTMENT OF ZONING AND CURRENT
DEVELOPMENT (ENGINEERING)
ROOM 227
Virginia Department of Transportation—Pavement Design Guide 0 1996 (rev2000)
Appendix IV
Flexible Pavement Design Worksheet for New Subdivision Streets
This sheet is intended for use and submission in conjunction with VDOT's Subdivision Street Requirements
County fri
bett4P4 die Date. 4-f.104-
Subdivision 14eltlel-JM, .
Street Name 1314 1,0Oe
1 Lp,T Developer XI rtar-- C eitao4 - I Phone:
ADT Projected traffic for the street segment considered,as defined in the Subdivision Street Requirements.
CBRD Design CBR=Average of CBRT x 2/3 and modified only as discussed in the Pavement Design Guide.
CBRT CBR value of the subgrade sample,taken and tested as specified in the Pavement Design Guide ,-
DBE VDOT District Materials Engineer .
EPT Equivalent projected traffic
HCV Number of Heavy Commercial Vehicles(e.g. trucks,buses,etc.,with 2 or more axles and 6 or more tires).
%HCV Percentage of the total traffic volume composed of Heavy Commercial Vehicles.
RF Resiliency Factor=Relative value of the subgrade soil's ability to withstand repeated loading.
SSV Soil support value of subgrade(SSV=CBRD x RF)
Dp Thickness index of proposed pavement design computed by the Conventional Pavement Design Method
DR Thickness index required,bated on Design ADT and SSV,determined by Appendix II.
re 4,fiits_ *- ,k,H. ? :=.. Step 2 Determine-Design.-Values�
;4-1,V 4terml;nt ,r esrgn4.14M ; '1,4- RFr'anc!° SV n-I,w r
1
ADT 10 Sample _ DBRT Resiliency Factor (RF)
# 1 2• 1 Source Value
e/%HCV= 100 x HCV x ADT) I�,�„ #2 Table 1 Z•O
or
20 x HCV Note:For #3 Appendix I
%HCV>5%,
4 Note:For%HC/V El 5%,,use ADT PT>ADT
Do # DME approved RF
1— rl00 Y. l O0v t<<•0—0'o )Y T II For preliminary designs,use the lowest RF
# value in the equation
DesignADT 1/„�, =
Use greater ADT or EPT 9w CBRD x RF ;'SSj7
( J''1 ) x ( 22 ) = 3•z'
Step\.3:Pavement Design (Check appropriate box and show proposed pavement design below.)
❑ (A) Limited to Design ADT S 400 -Show pavement material notations and thickness from Appendix 1 V Tables A and B
(B) Show pavement section as developed in the Pavement Design Guide. DR = ) .0
(See Appendix IIl for material notations and thickness equivalency values(a)) from Appendix II
Description of Proposed Pavement Section
Material Notation Thickness,h a (a x h)
Surface S --et:5*itt-- l •5 7 2S 3.3/(
Base g U --ZS=O 4 .0 2•ZU q.00
Subbase 24 —B 'g.O e o 4-to
Dp must equal or exceed the value of DR. Dp= E(a x h)= 17. 1$'
j Q Virginia Department of Transportation—Pavement Design Guide ® 1996(rev2000)
vV W,P
+W(51 411-
€14 t'G`t S )►tt • $us �e 24.0
"'_T 24.0
30, 000 23.0
20,000
Example 10,000 20. 0
30— or more DR= 10.7 (interpolated) 6,000 19. 0
2 for design parameters 4,00.0 18.p
U = SSV= 11 and Design ADT=480
13 --- (interpolated) 3, 000 16. 0
12-- 2 l ! :
19—
.,�
.................. . - 1,000 14.0
8— • - • . �-- 8 00 13. 0
_ 600 12. 0
6— .................. . 11.0
40 0
5-- '
4 300 10. 0
3--
2— 200 9. 0
1—
100 8. 0
SSV
Scale 50 7.0
Design ADT 6. 4 Minimum
Scale s.o
DR
Thickness Index
Scale
Please refer to Appendices II and V for the application of this diagram in the design of pavement.
Virginia Department of Transportation--Pavement Design Guide 0 1996 (rev2000)
Appendix IV
Flexible Pavement Design Worksheet for New Subdivision Streets
This sheet is intended for use and submission in conjunction with VDOT's Subdivision Street Requirements
County be4tteire— I Date- 4 /D 4-
Subdivision ettte/ r t-s
Street Name pouf-k., Loci-
Developer {Q,il� - akivi- / ��/J - Phone:
ADT Projected traffic for 'the street segment considered,at defined in the Subdivision Street Requirements.
CBRo Design CBR=Average of CBRr x 2/3 and modified only as discussed in the Pavement Design Guide.
CBRT CBR value of the subgrade sample,taken and tested as specified in the Pavement Design Guide -
DME VDOT District Materials Engineer
EPT Equivalent projected traffic
HCV Number of Heavy Commercial Vehicles(e.g. trucks,buses,etc,with 2 or more axles and 6 or more tires).
%HCV Percentage of the total traffic volume composed of Heavy Commercial Vehicles.
RF Resiliency Factor=Relative value of the subgrade soil's ability to withstand repeated loading.
SSV Soil support value of subgrade(SSV=CBRo x RF)
Dp Thickness index of proposed pavement design computed by the Conventional Pavement Design Method
DR Thickness index required,based on Design ADT and SSV,determined by Appendix II.
• { Step xDetennine-Design?Values�g
tep etermrngnADT�; �,.
ADT "200 Sample DBRT Resiliency Factor (RF)
# 1 7.4 Source Value
%HCV=-- 100 x HCV x ADT) # 2
or 7�0 Table 1
20 x HCV Note:For # 3 Appendix I
%HCV>5%,
Note:For%HCV l' S%,use ADT EPT>ADT # DME approved RF
, For preliminary designs,use the lowest RF
value in the equation
Design ADT CBRD x RF = ;;SSV
Use greater of ADT or EPT 2.:90
( .j. 9' ) x ( 2- a) = 3-
Step.3:"Pavement Design (Check appropriate box and show proposed pavement design below.)
(A) Limited t0 Design ADT 5 400 -Show pavement material notations and thickness from Appendix IV Tables A and B
(B) Show pavement section as developed in the Pavement Design Guide. DR = 1-Cr
(See Appendix III for material notations and thickness equivalency values(a)). from Appendix II
Description of Proposed Pavement Section
Material Notation Thickness,h a (a x h)
Surface SyV4--C1'5)if Z•b 14 — 3.3 +--
Base 1.0 ).ao 1'• 'O
Subbase
Dp must equal or exceed the value of DR. Dp = (a x h) = 1 ', 3
26
0 ,....04 .`
1^ /,A Virginia Department of Transportation—Pavement Design Guide ® 1996(rev2000) • _
kV WI?
1114°4-
- 25.0
Lefr
Jt( i
LJ 3020 , 000000 ,._ 23.0
,
Example 10,000 20. 0
30— or more DR= 10.7 (interpolated) .— 19. 0
3 for design parameters 6,000 — 18. 0
1 SSV= 11 and Design ADT=480 4,00.0 -- I7.0
12— ` (interpolated) • 3, 000 16.0
11---......................... 2, 000 — 15. 0
10-- 1,00 14. 0
9— - --
8— '• 800 — 13. 0
7-- .. 6•00 12. 0
6--I •...
5--- •40Q ..............�— 11. 0
4 300 .— 10. 0
3—
2—
. .
9.0
1—
100 _ 8. 0
SSV
Scale 50 — 7.0
Design ADT — 6. 9 Minimum
Scale s,o
DR
Thickness Index
Scale
Please refer to Appendices II and V for the application of this diagram in the design of pavement.