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<br /> { i 118 1t'01.17'1; LOCA770M AND
<br /> i� N
<br /> Sight distance iR tha length nF randtvn hl,1 ti#15N7'.4 Of' 11,111111'.1 l' SR Fk7"Y�l�ttYtl 1fl;SIr.N Z:tJ t 'i
<br /> driver.
<br /> Per parpeaas of tfesign Arrt!oF€arntinn, it is termed atop. t .
<br /> y nitaRi! visiblfl to the tlQ!€R, wl:t J)AVrtnCtttek that rtrt:fret:aF tttittl,rnlow,or lee vary frolkt
<br /> ping sight tjistnnce And flimnin
<br /> [ g sight it
<br /> (Rea pig.tt � fj 3t{Ftrr spttt'ltR of:itt lops[ Est t1.2U for BlkreelR of?ti€tk{lf:. �'[ : ,
<br /> f ! I1tl.Stopping Sight blstance. !! g g t;-•4).
<br /> Ato)sin Sight tiistrulca is the Unolttunts lltthelligitways lrt,ttlt!F.ltexi ht.tfietstnetrl>ela iltnn
<br /> tats! distance tr$vrTcrf tlurirtg three Little IrttetvAlB the nlittinlun►tttttlrpitlq 1l17ittlul!e. 'l`lle ntlnJtaxsiatg sight di:,innev
<br /> !
<br /> for tlta driver to Perceive the hAaRrtf, (2}the tuna to rear (3)the 1
<br /> 4 ea t!€a time i.l its-mot!tlitae€txtujtttin{;dir+tautt.•tt. The AA-SI I0 lipecirmti A!i)le of
<br /> € tints to Stall the vehicle after the b", nra alll}lit?<l. act,C)the slight Cron[die driver's eye:3 j'ft above tee paveaketlt:lnt't€€t:i'.to silk
<br /> brat two intervals,1,its tea islrate l)roceeda at fall Speed; during the abject tilt Usti roadway tS in. hiirii, tnl flit tktitlnoptit€tt "i" 'Illy
<br /> ;-
<br /> third interval,its Speed retlut:et!to zero,Anti this must hRJ}per. object lower dinn ti its.will not be a serium ofintruetitt€k if lilt.
<br /> 117. Passing Sight Distance. NP—wing fkht eli"ta lire is the
<br /> /Height of eye ahartrst tliRturtee suflieiont for a vehicle: to flail out of A traffic
<br /> tint)at sight lane, pose another velsiala, and than,turn btu:k to the xnnte lane
<br /> �_ Neigtttota6fac! if
<br /> t 3.75 --
<br /> 0„- �----- ; t�pposfngYehiete
<br /> A "'Passing sight distance 3.751 appears t+zlten passing
<br /> }
<br /> (Safe stopping distance) �'f � yehicly reaches point A t
<br /> t :
<br /> Passingvahieie A piliST.l?iU1SE
<br /> Passing sight distance _
<br /> �.profits of road
<br /> €ktl.04 dt }d2 _+ 3 i � �I; k i� ,�' '
<br /> before hittin
<br /> g stn ObIltruction or A vehicle ahead.
<br /> f$test ward frorn tile C•fektitrnoF-Rtlfet
<br /> i
<br /> average driver n•actioA tltnA of a. y Cuustei!(lflGS}er€Ifs Fortin -- Td?- F
<br /> 1 See. During this interval of d_ __..dx _ -- ,-d3 -
<br /> �a acs, A tzar going 9(j mpll ttault! tanval 4d (t. k i
<br /> € The bnkking distance (callers d) tlrllends Upon the Rpecil Rnd �t la.o� t?t�El,vttts qt IfnnwlfiK n',KtTt tt:ntanac.
<br /> ( the tylle of PAverr)ent. By a prineillln in ruecilnllics:ftlrrc tirnea
<br /> l = diatanrn r+qr fds change in><inetie ctrrrgy,or
<br /> snfniy Rnil ralnfortably y'Allopt inta:rfer1!,g ufitl ,tlka ov{tr�tt{{'n
<br /> Wf X d f iY vt A Wu4 vet)irtr or ur€ttrtrolnitrg vrltit;4r ltriY.oljlsi{tkt t31a{[lewigu tipetit�Nftt,atfti l
<br /> f L g 4q,4 (a) t it carne irlto view After tfiti Thotzin �tltstierlver lg Rtitrl.rfl (14pell•iiit,
<br /> train Which ' 3 04,95 mid 96).
<br /> Of
<br /> i • ',
<br /> i tl=•`Tf .1 U1 (tfl4) 318. Sight Distance �lang 'iforizanl� Curges• 'l'f,te vi�;fiiiity
<br /> f where V is the s
<br /> around horrr,ktktni curet_q nilly 17r: i[rttittai leis ist:t:t€ut€t t€f Uf:strnt=- t
<br /> Speed of the vehicle(Intlh)tit the instant the!€rrkirt n boles Stich o:+ tt lk)rilditlq til• rt)rttJ t{nult. Two cttsrrs will {>tr efin-
<br /> t and It1)l€!it•d arkdlie t!)e caefficicnt of friction of Ella tires against aitirretl: (1) whoa€ Clio Right tlititullge S is lcsas thotk tilt lel€i;th of
<br /> i
<br /> the lely 2.rite. FF t(sre) in the permptiork-rMetio, time,apprnx• y
<br /> �i imRtaiy 2.5 sec,, lllell e:tsrvrt Lt tlkekt is,tuber€:! � f.Jr ('L) tvhcu ? 1: (l''iKf p8)•
<br /> Tilt 1ff «+ ufratr t(istnnee,%front d4l crac !'►ni;of rtlntltv�ky btu tha ,.
<br /> ) t ij.
<br /> dapping rlistaatx: —. tlllxttuctlani
<br /> :lit l•! l t_r (j85 = Right distance, it,nlalll;•til,e t.�t'-titer line of rootfwoy, t
<br /> 3tif T t
<br /> t
<br /> Values of the Fnntion factor (sk"1111rietl ctlnstrukt) for nar€Hill, �� ` stiles of ilingRrolliv oaf Vm Ft; _
<br /> t ,
<br /> t ?) _ cnrrcrtpltr)$inq tlel;rt t;ul f:trrvntnre.
<br /> • i
<br /> th ..,,-• •..-,.�.. ..tit
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