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f! �U Design of Paverrtr^.r Soverures <br /> ' 4 _ <br /> i <br /> L <br /> 3 <br /> Serviceability <br /> o <br /> C7 <br /> eC <br /> m ' <br /> O • <br /> 1• ' <br /> Rumng <br /> ,P. <br /> V 6 >: 10 t 2 <br /> l:z ei.ayer?-,icknnss. C�stincnesl <br /> Figure 4.4. Exarnpie t:ot N of total dumnae vorr is bzsa lay:sr thi-_�-nesa for both <br /> serviceability an : nutting criteria. <br /> (' All designs presented are based on Tither a initial serviceaniLty of iLn aggr.Zzte-su;-facei <br /> 50 or 75 per=nt level of reliabi:.ty. - road was 3.5, the corresponding terminal <br /> serNicrability inherent in the deli?-a solution <br /> (3) The designs are for environment: !conditions is 0.5.) <br /> corresponding to aU six of the U.S.climatic <br /> regions(see map in Figure 4.1). 4.2.1 Flexi'_Ae Pavement De,ipn Catalog <br /> (4) The de::gns are for five qualitative levels of Tables 4.6 and 4.7 present a catalog of flexible <br /> roadbed soil strength or support capability: pavement SN values(structural numbers)that may be <br /> Very .Good, Good, Fair, Poor, and Very used for the design of low-volume roads when the <br /> Poor.Table 4.2 indicates the levels of road- <br /> bed soil resilient modulus that were used for• more detailed design approach is not possible. Table <br /> each soil classification. Table 4.! indicates 4.6 is based on the 50 perccrt reliability level and Table <br /> 4.7 is based on a 75 percent level. The langc of S`: <br /> the actual lengths of the seasons used to tialucs shown for each conditien is based on a specific <br /> quantify the effects of ea,:h of the six chmat.c - <br /> rar.;c of 15-�ip ESAL anl•!icatior,s ..t each traf%c <br /> repons on pi eTc;,t <br /> lc� <br /> (r) T`!: term^,r.al se.,;cc;b;::!} for t`:c flcx:bi <br /> and r: .; ra,, :.cnt do _�s zin i t:.c :; :1 <br /> u�erall dcs:>n ser"iceac.;it" loss uscu for %:c .., I'Co.;C J to <br /> aggregatc-surfaced roads is 3.0.(Th,_,s,if the LC,w f0,0&0 to <br />