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Pavement structural design for tow- volume roads is <br />divided into three categories: <br />(1) nexl3k p i'vMr ats. <br />M rigid pav=cats, and <br />(3) zarspte- suelaced roads. <br />Uis chaptatcavien the-desIV of kw-Mh ,e reads for <br />these tares Aufm types Using promdures based on <br />designt3larss �� ?� � catalogs. These <br />two procedtisrs sre eavetu d in Se=itn 4, i and 4'. <br />t ,ely. For satfaes umtmest ar ciaig seal paw - <br />1 1 tumthrproceduses:orPsziblepavements <br />=—y be used.. - <br />.,,B*= Itz prsaa. -y bzsb t'or ail teal pavec= <br />azieic" x- phi :ati: =irtis ze=� S intbis" Guidt to <br />•as: tda-z 3f4 cgn.•sairst SM& azL- Fond (:SAIL) <br />desgg: aywaze a for law -voh=r r=ds. regardless of <br />hcw :nw to stelae krd is -or what the dis:.ibution is <br />birou:ett auw=ch1l= and truckL <br />Since =my* suss and cw.:nty roads that fad <br />and ershe low-voltme caiegotymaystill carry sigaift- <br />eant kvrls of U=k =01c, the tttartistu m number of <br />1 &33p 2=51!1 -. ns cosssidmed for flexible and <br />rigid pavement design is 700,!300 to 1 million. Tke <br />pra=i=tminimum sraffelewd tl=can be considered <br />for aiay Rrst'ble or tig"rd pa--Vm=t during a given <br />perfarmas>se period is about 50,1300 18-kip ESAL <br />appikarioas. FortbcaEMZvA4wft ( grave n roads' - <br />used for many tosmty and forest roads, the maximum <br />tra$Ckvei is ..V.t W IS- cip ESAL applica- <br />dons, a'lac the pmt minimum k%V1 (during a <br />4n0e x otmam Period) is 10.000. <br />Chapter 4 <br />LOW- VOLUi+►IE ROAD DESIGN <br />basic step -by -step procedures described in Chapter 3. <br />The primary difference in the design for low - volume <br />roads is the level of reliability that eiay be used. <br />Because of their rclative low usage and the associated <br />low. level of risk, the level of reliability recommended <br />for law - volume road design is 50 percept. The user <br />may, however, design for hlghei levels of 6o to so <br />percent. depending on the ac=l pro;ft-.ed level of <br />traffic and the feasibility of rehabilitation, fmporaaee <br />of corridor, etc. - <br />SeasorsdRoa4edSoffResf7mfA1oduF Table 4.2 <br />pro roadbed soil resilient modulus values that <br />maybe used forlow volume road desigzifthe user can <br />class the general qualftyofthe roadbed material asa <br />foundation for the pavement str ctur e. If tho suuggested <br />values in this table are combined with the suggested <br />season lengths identified in the previous section. <br />effective roadbed soil resilient modulus -waiucs (for <br />flexible pavement design only) can be generated for <br />each of the six U.S. climatic regions. These bt values <br />are presented in Table 4.3. <br />six d i_ZW= r.'l TCV' o hA thaw Si mand ' . . • . . <br />the eatiraam:,nta# Cist d�ccb. . <br />Blud nit d=-- :tgi :�'i�tic•�T ied.l x✓ay. . . <br />be used to clout the .seasoa - .l.agtfss 'ruder! 'for ' <br />dote a�ingthe Gffecsivctoa3lci soilt�taoduhis : <br />(Section 23.1) for flexible paventept desipa or the <br />effective modulus of subgrade traction (Suxtion 3.2-1) <br />for rigid pat=ent desigm <br />1f. in estimating an effective resilient modulus of t'ae <br />roadbed material (M <br />R) an effective modulus of <br />submde raactien (k), i. is not possible to determine <br />the lengths of theseasor.s oreventhe scasoasi roadbed <br />soil res:Iient moduli. the following xc lgestiew sbom*4 <br />be onside.:• <br />L.l DESIGN CH.{RT PROCEDL=RFS <br />4.1.1 Flexible and RiZid Pavemeass <br />Tea !sx- valume raid desgn char. procedures :o: <br />and r.-L64 pav=_-sns art basic2lly tht <amc as <br />t :: sa za : : :ef:c.ay pat'r- »: design. T'. low- %ulvme <br />.:C r :r ::dWC ba ii' :ZK re on t :_ art .'t dCSign <br />rc.3::i.c.:.cnts (develop. -d in Chaper 2) as well as tt:e <br />It 'a Gf ON <br />4.1 .2 A$gretste- Surfsteed Roads <br />Trc basis fortrcatmgthect:er:soiseaso: almoistur: <br />changes on roadbed sot! resilient mcd..Ius. `.1... is tF: <br />:.1tYic :or �}', =tC�1t�•Ji C:aCCi; ro ad dill ?;1 :5 31 is f.' r <br />ur air :� �rs :fin l`:,::L'G::::CS. �.u: �Cr. :::e L :S : ;G C�:�. ^ .• <br />i ! :CC :4LrC t�`.C.". Q'rC :2•S'r : : :rd reds r, :qu:r:s <br />a sm hical fiolution. It is imps tart to no iltail t::: <br />dui 'u0i]EimSSH sianJ uJalsala <br />'Wj/ i : I OAA7 A7 •,psi <br />REVISED JULY 2006 Attachment 2.05.3(3) -8 -9 <br />