lecture 3 - vertical curves
TRANSCRIPT
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7/21/2019 Lecture 3 - Vertical Curves
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Vurvcyedg-EEFC-:
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Furvcscrtefia Furvcs
Ed ibbeteod to `orezodtia furvcs t`it go to t`c reg`t or acnt,roibs iaso `ivc vcrtefia furvcs t`it go up or bowd.
^crtefia furvcs it i frcst or t`c top on i `eaa irc fiaacbsummet furvcs, or ovcrvcrtefias.
^crtefia furvcs it t`c jottom on i `eaa or bep irc fiaacb sig
furvcs, or udbcrvcrtefias.
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Furvcscrtefia Furvcs
Ed t`c simc wiy t`it `orezodtia furvcs irc uscb to foddcftedtcrscftedg strieg`ts ed t`c `orezodtia paidc, vcrtefia furvcsirc uscb to foddcft edtcrscftedg strieg`ts ed t`c vcrtefiapaidc.
R`csc strieg`ts irc usuiaay fiaacb gribecdts idb t`c
fomjediteod on t`c on t`c gribecdts idb vcrtefia furvc eshdowd is vcrtefia iaegdmcdt.
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Furvcscrtefia Furvcs
R`c vcrtefia iaegdmcdt es fomposcb on i screcs on strieg`t-aedc gribecdts foddcftcb jy furvcs, dormiaay pirijoaef ednorm.
R`csc vcrtefia pirijoaef furvcs must t`crcnorc jc provebcbit iaa f`idgcs ed gribecdt.
R`c furviturc weaa jc bctcrmedcb jy t`c bcsegd spccb,jcedg sunnefecdt to provebc ibcquitc brevcr fomnort wet`ippropreitc stoppedg seg`t bestidfcs provebcb.
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Furvcscrtefia Furvcs
\urposc on ^crtefia Furvcs ^crtefia furvcs irc semeair to `orezodtia furvcs ed t`it t`cy
irc bcsegdcb nor i pirtefuair spccb.
R`c mied nudfteods on i vcrtefia furvc irc to provebc;
Vincty idb fomnort trivcaaedg jctwccd gribecdts
Ibcquitc vesejeaety to cdijac vc`efacs to stop or ovcrtihcsincay.
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Furvcscrtefia Furvcs
W`cd two benncrcdt gribecdts mcct t`cy irc foddcftcb jyi furvc ed i vcrtefia paidc es fiaacb vcrtefia furvc. et es uscbed roibs idb rieawiy.
Ojkcftevc;
Ro roudb onn t`c idgac it t`c ipcx idb to ojtied i gribuiaf`idgc ed gribc or gribecdt, so t`it ijrupt f`idgc edgribc es ivoebcb it t`c ipcx.
^crtefia furvcs miy jc;
i) Ferfuair irf j) Irf on \irijoai
Nor sempaefety on fiafuaiteod worh, t`c pirijoai es prcncrrcb.
W`cd t`c riteo on acdgt` on furvc to ribeus es acss t`id 9 to 9
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Furvcscrtefia Furvcs
Ed priftefc, roib idb rieawiy gribecdts irc fompiritevcaynait idb et es ontcd udemportidt w`it typc on vcrtefia furvc esuscb.
R`c usuia furvcs irc ferfuair or pirijoaef. @owcvcr, et es jcst
to usc i vcrtefia furvc `ivedg i fodstidt ritc on f`idgc ongribecdt, e.c., i pirijoai idb is et turds out, pirijoaefvcrtefia furvcs irc vcry cisy to fiafuaitc idb usc.
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Furvcscrtefia Furvcs
\irijoai is bcserijac f`iriftcrestefs on;9) Fodstidt ritc on f`idgc on saopcs w`ef` fodtrejutcs
to soot` iaegdmcdt tridseteod.
:) Cisc on fomputiteod on vcrtefia onnscts w`ef` pcrmetsciseay fomputcb furvc.
R`c Gribc nor t`c gribecdt on i roib es cxprcsscb ed two wiys;
i) Is i pcrfcdtigc e.c : % 9.3 %
j) Is 9 ed d , w`crc d es `orezodtia bestidfc ed mctcr or
ncct forrcspodbedg to 9m or 9nt resc or niaa. C.g 9 ed 0< &9 ed 9
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Furvcscrtefia Furvcs
Rypcs on vcrtefia furvc;
9) Id up gribc noaaowcb :) I bowd gribc noaaowcb
jy i bowd gribc jy id Sp gribc
Vummet or Fodvcx Vig or Fodfivc 5
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Furvcscrtefia Furvcs
Rypcs on vcrtefia furvc;
6) Id up gribc noaaowcb 2) I bowd gribc noaaowcb
jy idot`cr up gribc jy idot`cr bowd gribc
Vummet or FodvcxVig or Fodfivc 9