Multi Moal Transportion u for Effingham Count APPENDIX C. Travl Dman Mol Dvlopmnt APPENDIX C. Travl Dman Mol Dvlopmnt As a part of Effingham Count Transportion Plan, Jacobs Carr Burgss (JCB) vlop a travl man mol for th Gorgia Dpartmnt of Transportion (GDOT). A travl man mol is a mhmical tool th pricts futur travl man bas on currnt conitions, plann or propos transportion facilitis, an projctions of houshol an mplomnt characristics. Travl man moling was us to valua th prformanc of th roawa ssm in Effingham Count. Effingham Count s mol is a traitional analsis tool th is us to intif whr major improvmnts shoul b ma to its roawa ssm. Sinc thr is usuall mor than on strag propos to arss futur congstion an saft concrns, th mol is frquntl us to stu which combinion of improvmnts provis th most bnfits. A mol, howvr, is onl on rsourc to intif ns. Th nxt sctions scrib th gnral mthoolog of traitional four sp travl man moling an th spcific inputs to th Effingham Count mol ntwork. Four p Moling Four sp travl man moling implmnts an iras th following sps: trip gnrion, trip istribution, mo split, an ntwork assignmnt. In ssnc, whr o popl travl to an from, in wh tp of vhicl, an along wh rou? In this cas, pontial pstrian, biccl, an transit trips wr valua off mol an so vhicl tp (mo split) was not valua in Effingham. Trip Gnrion Trip gnrion is th first sp in th traitional four sp mol procss. It stimas th numbr of trips th will bgin an n in an ara known as a Traffic Analsis Zon (TAZ). Th origins an stinions of travlrs ar rfrr to as trip ns. Trip ns gnra b houshols ar rfrr to as prouctions. Trips ns calcula from mplomnt or stunt nrollmnts ar rfrr to as tractions. Th trip gnrion procss is accomplish b stablishing rlionships btwn trips an socioconomic variabls. Th procss stimas th numbr of trip ns, or prouctions an tractions, for ach TAZ b various trip purposs. Trip gnrion rmins th total trips gnra b ach TAZ s socioconomic characristics. Th trip gnrion procss inclus trip prouction an trip traction. Trip prouction applis trip ras through a cross classificion of houshol siz (1,2,3,4+) an automobils availabl (0,1,2,3+) for stimion of inrnal prson trips. Aggrga houshol a for ach TAZ is isaggrga into 16 cross classifi clls using a houshol strificion mol. This mol braks out th total numbr of houshols into cross classificion clls using houshol mian incom b TAZ. Th rgrssion quions ar appli to th trip prouction for vhicl trips. Th trip traction applis rgrssion quions for all trip purposs. Tpicall, thr ar thr tps of trips th th mol inclus: (1) Inrnal Inrnal (I I) trips whos origin an stinion ar insi th stu ara; (2) Inrnal Exrnal (I E) trips th hav on trip n Jul 2008 C 1
Multi Moal Transportion u for Effingham Count APPENDIX C. Travl Dman Mol Dvlopmnt insi th stu ara; an (3) Exrnal Exrnal (E E) trips th hav both trip ns outsi of th stu ara. I I trips follow th prouction an traction procurs. I E an E E trips ar vlop sparal using a iffrnt mthoolog th is havil pnnt on traffic counts obsrv on th major roas through th stu ara. TRIP PURPOSES Svn trip purposs wr inclu in th trip gnrion procss. Ths purposs ar summariz blow: 1. om Bas Work (BW): prson trips ma for th purpos of work th bgin or n a travlr s hom 2. om Bas Othr (BO): prson trips ma with on n th hom xcpt thos for th purposs of work or shopping 3. om Bas Shopping (BS): prson trips ma for th purpos of shopping th bgin an n a travlr s hom 4. Non om Bas (NB): prson trips th nithr bgin nor n hom 5. Trucks (Commrcial Vhicls): commrcial vhicl trips bginning an ning in th stu aras 6. Inrnal Exrnal Passngr Cars: passngr car trips bginning or ning outsi th stu ara 7. Inrnal Exrnal Trucks (Commrcial Vhicls): commrcial vhicl trips bginning or ning outsi th stu ara OUSEOLD STRATIFICATION MODEL Th houshol strificion mol subivis th total numbr of houshols b TAZ into 16 houshol stra fin b houshol siz an th numbr of automobils availabl. rificion is on using houshol mian incom. Th mol istribus th total houshols in a TAZ to ach crossclassificion cll b calculing a rliv probabilit th a houshol will b a particular siz with a particular numbr of automobils. Th rliv probabilit is calcula with th following quion: P ( i, j) = S I CF whr P(i, j) = rliv probabilit th a houshol will b siz I an own j autos S = houshol siz factor from CTPP 2000 lookup tabl I = incom factor from CTPP 2000 lookup tabl CF = composi houshol factor from GDOT Mol Procurs An stima of th numbr of houshols in a particular cross classificion cll is thn calcula b multipling th total numbr of houshols in th TAZ b th corrsponing rliv probabilit. Th Jul 2008 C 2
Multi Moal Transportion u for Effingham Count APPENDIX C. Travl Dman Mol Dvlopmnt final numbr of houshols in ach cross classificion cll is calcula b appling an ajustmnt factor to ach calcula valu. Th ajustmnt factor is appli to insur th th sum of rsulting isaggrga houshols quals th original aggrga numbr of houshols. This procss is rprsn mhmicall with th following quions: ij ( st.) = P( i, j) whr ij (st.) = Estima numbr of houshols of siz I th own j autos = Total numbr of houshols in th TAZ ij = ij ( st.) F whr ij = Final numbr of houshols of siz I th own j autos F = / ij ( st.), control total ajustmnt factor Tabls C.1, C.2, an C.3 show houshol siz istribution, houshol mian incom istribution, an oushol Siz/Incom/Auto Ownrship Distribution. Jul 2008 C 3
Multi Moal Transportion u for Effingham Count Tabl C.1 oushol Siz Distribution APPENDIX C. Travl Dman Mol Dvlopmnt Compu Prsons/ oushol Siz Rangs 1 2 3 4+ 0.0 1.0 1.0000 0.0000 0.0000 0.0000 1.0 1.2 0.7709 0.2075 0.0216 0.0000 1.2 1.4 0.7182 0.2331 0.0403 0.0085 1.4 1.6 0.5766 0.3122 0.0722 0.0390 1.6 1.8 0.4358 0.3839 0.1164 0.0639 1.8 2.0 0.3200 0.4500 0.1200 0.1100 2.0 2.2 0.2871 0.4324 0.1393 0.1413 2.2 2.4 0.2637 0.3567 0.1844 0.1953 2.4 2.6 0.2381 0.3298 0.1891 0.2430 2.6 2.8 0.1987 0.3146 0.20 0.2850 2.8 3.0 0.1801 0.2871 0.2095 0.3232 3.0 3.2 0.1486 0.2948 0.1872 0.3693 3.2 3.4 0.1300 0.2500 0.1850 0.4350 3.4 3.6 0.1300 0.2200 0.1800 0.4700 3.6 3.8 0.1200 0.2100 0.50 0.4950 3.8 4.0 0.1100 0.2000 0.00 0.5200 4.0 4.2 0.0500 0.1800 0.1500 0.6200 4.2 4.4 0.0300 0.1300 0.1400 0.7000 4.4 5.0 0.0200 0.0500 0.1300 0.8000 Tabl C.2 oushol Mian Incom Distribution TAZ-lvl Mian Incom Group1 Incom Group2 Incom Group3 Incom Group4 Incom <$,500 $5,000 - $34,999 $35,000 - $59,999 >=$60,000 $0 $4,999 0.8009 0.1123 0.0334 0.0534 $5,000 $9,999 0.7150 0.1583 0.0756 0.0512 $10,000 $14,999 0.5959 0.2284 0.12 0.0584 $15,000 $19,999 0.4256 0.3358 0.1575 0.0812 $20,000 $24,999 0.3347 0.3437 0.2119 0.1098 $25,000 $29,999 0.2523 0.3063 0.2525 0.1889 $30,000 $39,999 0.15 0.2549 0.3329 0.2407 $40,000 $49,999 0.1076 0.1943 0.3240 0.3741 $50,000 $59,999 0.0887 0.1443 0.2754 0.4916 $60,000 $69,999 0.0666 0.1088 0.2111 0.6135 $70,000 $79,999 0.0473 0.1009 0.81 0.6738 $80,000 $89,999 0.0450 0.0800 0.50 0.7000 $90,000 $99,999 0.0410 0.0506 0.40 0.7343 $100,000 $109,999 0.0340 0.0331 0.1401 0.7928 $110,000 $119,999 0.0200 0.0300 0.0900 0.8600 $120,000 $124,999 0.0000 0.0200 0.0500 0.9300 Jul 2008 C 4
Multi Moal Transportion u for Effingham Count Tabl C.3 oushol Siz/Incom/Auto Ownrship Distribution APPENDIX C. Travl Dman Mol Dvlopmnt Autos Availabl Incom Group Prsons Pr oushol 0 1 2 3+ 1 0.30628 0.66893 0.02479 0.00000 1 2 0.09778 0.65778 0.22222 0.02222 3 0.07326 0.69093 0.16279 0.07302 4+ 0.10000 0.56941 0.647 0.15412 1 0.25483 0.47759 0.22586 0.042 2 2 0.04000 0.21400 0.63200 0.11400 3 0.11111 0.12556 0.60333 0.16000 4+ 0.09000 0.10797 0.59420 0.20783 1 0.18333 0.60560 0.15775 0.05332 3 2 0.02740 0.16767 0.63425 0.068 3 0.09000 0.10500 0.50333 0.30167 4+ 0.06000 0.04381 0.38619 0.51000 1 0.05769 0.66539 0.20000 0.07692 4 2 0.06944 0.10444 0.53222 0.29389 3 0.02000 0.05814 0.50977 0.41209 4+ 0.01892 0.04054 0.54054 0.40000 TRIP PRODUCTION Th trip prouction uss cross classifi a from th houshol strificion mol an applis trip ras to calcula trip prouctions for BW, BO, BS, an NB. Tabl C.4 shows trip ras for ach purpos. Tabl C.4 GDOT Dail Trip Prouction Ras oushol Siz Auto Availabl BW BO BS NB 0 0.285 0.694 0.367 0.245 1 1 0.751 1.190 0.411 1.081 2 0.733 1.300 0.200 1.033 3+ 0.909 1.818 0.636 1.364 0 0.750 1.350 0.558 0.500 2 1 1.165 1.835 0.882 1.518 2 1.305 2.360 0.675 1.939 3+ 1.422 2.688 0.688 2.016 0 1.556 4.444 0.222 0.889 3 1 1.780 4.195 0.585 2.976 2 1.625 4.048 0.490 2.154 3+ 1.983 3.600 0.733 2.667 0 1.000 5.833 0.4 1.333 4+ 1 1.727 6.523 1.023 2.886 2 2.109 8.122 0.769 3.184 3+ 2.387 7.312 1.151 3.720 Jul 2008 C 5
Multi Moal Transportion u for Effingham Count APPENDIX C. Travl Dman Mol Dvlopmnt Trip prouctions for othr purposs ar calcula using th following rgrssion quions: I I Truck Prouction = 0.8404 ManufacturingEmplomnt + 0.7971 RtailEmplomnt + 1.0197 WholsalE mplomnt + 0.3424 SrvicEmplomnt + 0. 2481 oushols I E Passngr Car Prouction = 0.331 oushols + 0. 724 TotalEmplomnt I E Truck Prouction = 0.078 RtailEmplomnt + 2. 149 WholsalEmplomnt + 0.228 ManufacturingEmplomnt TRIP ATTRACTION Th trip traction uss th following rgrssion quions: BW Attraction = BO Attraction = 1.196 TotalEmplomnt 0.5077 Populion + 0.967 TotalEmplomnt + 1. 5258 SchoolEnrollmnt BS Attraction = NB Attraction = 2.655 RtailEmplomnt 0.293 Populion + 2.82108 (RtailEmplomnt + WholsalEmplomnt) 0.6984 SrvicEmplomnt I I Truck Attraction = I I Truck Prouction I E Attraction = Bas on counts an EE% (inrnal TAZs=0) I E Truck Attraction = Bas on counts, EE%, an Truck% (inrnal TAZs=0) Th total numbr of I E trips for ach xrnal stion is calcula b subtracting th stima numbr of E E trips (bas on an assum prcntag) from th ail traffic counts of th stion. Thn th total I E trips ar spara into I E passngr car trips an I E truck trips bas on an assum truck prcntag ach xrnal stion. Jul 2008 C 6
Multi Moal Transportion u for Effingham Count APPENDIX C. Travl Dman Mol Dvlopmnt EXTERNAL EXTERNAL TRIPS Two xrnal xrnal (E E) trip tabls wr vlop for th mol, on for passngr cars an th othr for trucks. E E trips ar alloca to othr xrnal stions bas on th magnitu of xrnal trips th pontial stinion an th istanc btwn th stions. Th highr th traffic count, th mor likl it will tract E E trips. Th xrnal trip stimion procss assums th th largr th istanc btwn xrnal stions, th highr th probabilit th trip inrchang will srv E E trips. For xampl, tpicall, th istanc btwn two xrnal stions on ithr n of an inrsta facilit woul b longr an, likwis, th numbr of trips th will travl btwn th two xrnal stions on ithr n of th inrsta woul b highr. Trip Distribution Th trip istribution uss th gravit mol procss, a commonl us tool th stimas th numbr of trips btwn placs bas a cost such as tim or istanc. Th stima numbr of trips btwn an two origin stinion zons will, in gnral, b proportional to th numbr of trip ns an invrsl proportional to th travl tim btwn ths two zons. Th gravit mol compus trips such th th rsulting istribution mchs an obsrv istribution of trips b travl tim for ach of th trip purposs. Minimum tim phs for th ntwork ar calcula using Cub Voagr function. Ths tims inclu turn prohibitions an turn pnaltis. Th minimum tims ar thn ajus to inclu intrazonal tims, rminal tims, an topographical pnaltis. Intrazonal tims, th avrag tim it taks to mak a trip insi a particular TAZ, ar cra b th Cub Voagr function using travl tim to th narst four TAZs. Trminal tims ar assign bas on th mplomnt nsit of th origin an stinion TAZs. At th trip origin n, rminal tim gnrall rfrs to th tim walking from rsinc to cars. At th trip stinion n, it gnrall rprsnts th tim to go from cars to stinion. Tabl C.5 summarizs th rminal tim criria. Tabl C.5 Trminal Tim Criria (Minu) Emplomnt Dnsit (Total Emplomnt Pr Acr) Zon 0-1.00 1.01-15.00 15.01-25.00 25.01-50.00 50.01-75.00 >75.00 Origin 1 1 2 2 2 2 Dstinion 1 2 3 4 5 6 Gravit mol input consists of a st of travl tim impnnc factors (friction factors), in aition to prouction trip ns, traction trip ns an minimum tim skim. Ths paramrs forc th gravit mol to prouc sts of trips b trip purpos, whos istributions approxima an obsrv travl tim istribution. Th friction factors for th mol ar calcula b on minu travl tim incrmnts. Four of trip tabls, compu in th trip istribution procss, ar stima in rms of prson trips. For trip assignmnt procss, th four prson trip tabls ar convr to vhicl trips. Th four trip tabls ar BW, BO, BS, an NB. Th othr trip tabls, for I E an E E trips, wr calcula in rms of Jul 2008 C 7
Multi Moal Transportion u for Effingham Count APPENDIX C. Travl Dman Mol Dvlopmnt vhicl trips thir incption. Convrsion to vhicl trip tabl nabls comparison to vhicl counts an capacit analss. Tabl C.6 shows vhicl occupanc ras us in th mol. Tabl C.6 Occupanc Ra Trip Purpos Occupanc Ra om Bas Work 1.12 om Bas Othr 1.65 om Bas Shopping 1.48 Non om Bas 1.68 Trucks No ajustmnt, alra vhicl trip I-E Passngr Cars No ajustmnt, alra vhicl trip I-E Trucks No ajustmnt, alra vhicl trip Traffic Assignmnt Th last sp in moling squnc is traffic assignmnt. Trip assignmnt for th mol is accomplish using quilibrium assignmnt chniqu. Th traffic assignmnt algorithm is iriv, running through succssiv applicions until quilibrium occurs. Equilibrium occurs whn no trip can b ma b an alrna ph without incrasing total travl tim of all trips on th ntwork. Equilibrium assignmnt is an iriv procss th rflcts travl man assign to minimum tim phs as wll as th ffcts of congstion. In ach irion, traffic volums ar loa onto ntwork links an travl tims ar ajus in rspons to volum to capacit rlionships. Componnts of th Travl Dman Mol Th vlopmnt of Effingham Count travl man mol inclu (1) traffic analsis zon bounaris, (2) bas ar 2001 socioconomic a, (3) bas ar mol ntwork, (4) bas ar mol calibrion an valiion, (5) futur ar 2030 SE a, (6) futur ar xisting plus commit mol; an (7) futur ar buil mol. Each of ths componnts is scrib in furthr tail in th nxt sctions. TAZ Bounaris Th unit of gograph most commonl us in travl man mol, a traffic analsis zon (TAZ), usuall consists of on or mor cnsus blocks or block groups. Within ach TAZ, populion, houshols, an mplomnt totals ara riv an us as mol input for trip gnrion. Afr rviwing th cnsus block bounaris an roawas in Effingham Count, 52 TAZs wr fin. Th TAZ bounaris follow major highwas so th major highwas o not split TAZs. Figur C.1 picts th TAZ bounaris. Jul 2008 C 8
3 01 67 Scrvn rk h R B ro fil R 5 Pmbrok S ta 46 Bulloch k L l t so L f i l 10 Mils 280 Bran 19 R 1 a n 4 2 ig h w ± Ga a 1 19 1 E S ta R or 3 4 23 S 4 48 19 7 39 52 1 5 6 16 42 19 18 35 8 0 r r R 9 Jim 11 m P D 36 kw 38 49 5 27 Savannah Chham Poolr R 43 46 50 t a 2 46 80 6 52 1 1 a 1 70 a S 70 South Carolina 41 a w a 278 Jaspr a 336 a 2 5c Lo u is Ba v ill R Gorgia 47 Garn Cit 1 7 4 6 S t 29 a Ci 46 t w 0 2 2 7 8 Alt w 46 2 27 8 U s a a Long $ Bulloch Chham Chham Lgn $ This map is inn for planning purposs onl. Sourc: Cnsus 2000, GDOT, an Jacobs Carr Burgss Railroas Consrvion Aras Fort wart Militar Rsrvion War Cit Limits Othr Count Bounar Effingham Count Bounar Othr Lars Othr Roas a Rou / U.S. ighwa Inrsta Traffic Analsis Zon ID Roa Ntwork 00 Traffic Analsis Zons Collton Jaspr ampton Figur C.1 $ Effingham Bran Librt Scrvn Allnal Traffic Analsis Zons (TAZ) Wan Ttnall Evans Canlr Emanul Jnkins Burk Rgional Inst Effingham Count Transportion Plan Port Wntworth L oach P k l oo 37 31 Rincon 12 a 30 Pi n B arr n Bloomingal 40 10 41 34 13 l o R 32 C 51 45 Effingham 15 Ca Jo h n 8 33 30 21 Springfil 27 ampton 28 29 20 14 22 44 Guton Fort wart Militar Rsrvion 0 28 2 24 20 Ar g l Jul 2008 2.5 Brooklt Bu r 25 26 rt Fo Librt O l R i v rr al a 25 0 R ark nm td Bro o k l o Traffic Analsis Zons m Ar pt g 6 01 8 27 Offic of Planning 3 90 a 119 t Ro a Cou n ta R a R r El o rp il 7 ivr 1 st R R Da n F o r Ol t n Gr 1 32 S ta rs 21 Fa i a 21 Al t 0 3 1 a n w 119 Su a lv B ta R
Multi Moal Transportion u for Effingham Count APPENDIX C. Travl Dman Mol Dvlopmnt Socioconomic Da Tabl C.7 shows socioconomic (SE) a rquir an scriptions for ach TAZ. Appnix B, Ovrviw of Socioconomic Da Forcasting, scribs th mthoolog of SE a projction. Tabls C.8 an C.9 provi 2001 an 2030 SE a b TAZ, rspctivl. Tabl C.7 Socioconomic Da Rquir b TAZ Da Variabl Populion oushols Mian Incom Rtail Emplomnt Srvic Emplomnt Manufacturing Emplomnt Wholsal Emplomnt Total Emplomnt School Enrollmnt Acrs Dscription th total numbr of iniviuals th ar rsiing in a TAZ th total numbr of occupi houshols in a TAZ houshol mian incom in TAZ in 2000 ollar th numbr of mplos working for rtail businss work placs in a TAZ th numbr of mplos working for srvic businss work placs in a TAZ th numbr of mplos working for manufacturing work placs in a TAZ th numbr of mplos working for wholsal businss work plac in a TAZ th total numbr of mplos work placs in a TAZ Th total numbr of nroll stunts school locions in a TAZ ara of a TAZ in acr Tabl C.8 2001 SE Da b TAZ TAZ Emplomnt School Mian Cntrio Populion Acrs Rtail Srvic Manuf. Whol Total Enrollmnt Incom 1 92 229 0 0 3 0 3 0 16,482 30,000 590 2 109 292 0 22 0 0 22 0,224 45,355 591 3 2 593 37 38 0 0 75 500 6,500 45,355 592 4 503 1,416 1 15 0 2 18 0 9,143 45,355 593 5 4 481 0 73 0 0 73 900 3,500 39,880 594 6 236 646 0 110 19 3 132 700 5,163 39,880 595 7 190 537 0 6 0 0 6 0 1,885 26,125 596 8 338 845 13 129 35 0 7 0 5,224 46,475 597 9 205 604 0 69 0 0 69 800 3,182 39,880 598 10 395 1,042 0 22 188 0 210 0 5,267 39,880 599 11 255 860 0 16 0 0 16 0 1,452 68,200 600 12 223 633 9 0 35 0 44 0 1,885 68,200 601 13 73 195 0 0 0 0 0 0 3,759 48,475 602 14 66 209 8 110 0 0 118 0 2,651 39,880 603 15 72 203 0 4 0 0 4 0 4,625 48,475 604 16 192 537 0 2 0 0 2 0 1,152 45,355 605 6 464 0 149 9 0 158 0 7,643 42,000 606 18 211 632 0 2 0 0 2 0 1,565 42,000 607 Jul 2008 C 10
Multi Moal Transportion u for Effingham Count Tabl C.8 2001 SE Da b TAZ, Continu APPENDIX C. Travl Dman Mol Dvlopmnt TAZ Populion Emplomnt School Rtail Srvic Manuf. Whol Total Enrollmnt Acrs Mian Incom 19 148 398 9 46 30 2 87 400 2,064 42,000 608 20 143 468 2 8 0 5 15 1,900 1,940 42,680 609 21 243 1,018 12 250 0 0 262 0 1,552 42,680 610 22 87 261 36 243 0 0 279 0 5,105 45,335 611 23 105 281 0 5 0 0 5 0 12,332 45,335 612 24 74 209 11 4 0 0 15 0 11,199 30,000 613 25 15 44 0 0 0 0 0 0 1,548 30,000 614 26 22 49 7 18 0 0 25 0 3,326 30,000 615 27 1 497 9 5 30 2 46 0 14,770 30,000 616 28 121 347 0 27 0 0 27 0 15,104 45,335 6 29 143 434 0 9 0 0 9 0 5,124 46,085 618 30 289 769 0 110 0 0 110 0 14,210 46,085 619 31 127 400 0 0 0 0 0 0 8,816 39,315 620 32 169 451 0 0 0 0 0 0 4,203 39,315 621 33 316 786 15 460 0 7 482 400 1,984 41,250 622 34 344 946 3 37 0 12 52 0 4,798 44,775 623 35 200 529 31 168 0 10 209 0 2,438 42,680 624 36 1018 3,026 45 209 12 0 266 0 3,452 51,820 625 37 674 1,902 44 168 9 0 221 1800 4,200 51,820 626 38 25 61 51 16 15 5 87 0 1,587 49,090 627 39 371 1,015 23 30 2 1 56 0 2,332 39,880 628 40 785 2,249 15 255 0 0 270 0 4,725 50,625 629 41 300 918 0 104 0 0 104 0 4,731 68,200 630 42 324 1,000 0 6 0 0 6 0 6,856 42,000 631 43 255 821 0 8 0 0 8 0 2,294 49,090 632 44 451 1,386 6 139 0 5 150 0 6,668 42,680 633 45 333 918 35 465 149 15 664 0 5,881 51,820 634 46 17 3,6 431 656 1 1 1,089 0 4,263 55,565 635 47 74 214 0 7 0 0 7 0 14,783 49,090 636 48 200 496 5 31 0 1 37 0 12,574 45,335 637 49 143 399 0 6 1,426 0 1,432 0 6,473 51,820 638 50 366 1,052 0 54 0 0 54 0 10,428 39,315 639 51 88 249 0 4 0 0 4 0 5,347 39,315 640 Cntrio 52 123 348 0 11 0 2 13 0 3,587 45,355 641 Jul 2008 C 11
Multi Moal Transportion u for Effingham Count Tabl C.9 2030 SE Da b TAZ APPENDIX C. Travl Dman Mol Dvlopmnt Emplomnt TAZ Populion Rtail Srvic Manuf. Whol Total School Enrollmnt Acrs Mian Incom Cntrio 1 121 301 0 0 3 0 3 0 16,482 30,000 590 2 139 371 0 41 0 0 41 0,224 45,355 591 3 367 1,003 77 95 0 0 2 738 6,500 45,355 592 4 1,062 2,988 2 42 0 1 45 0 9,143 45,355 593 5 360 995 0 154 0 0 154 1,328 3,500 39,880 594 6 587 1,607 0 283 23 2 308 1,033 5,163 39,880 595 7 401 1,133 0 13 0 0 13 0 1,885 26,125 596 8 997 2,492 38 2,736 1,869 0 4,643 0 5,224 46,475 597 9 433 1,275 0 108 0 0 108 1,180 3,182 39,880 598 10 867 2,287 0 45 198 0 243 0 5,267 39,880 599 11 570 1,923 0 31 0 0 31 0 1,452 68,200 600 12 536 1,522 0 44 0 61 0 1,885 68,200 601 13 160 428 0 1,587 795 0 2,382 0 3,759 48,475 602 14 139 441 15 216 0 0 231 0 2,651 39,880 603 15 152 428 0 8 0 0 8 0 4,625 48,475 604 16 365 1,021 0 4 0 0 4 0 1,152 45,355 605 401 1,057 0 447 11 0 458 0 7,643 42,000 606 18 410 1,228 0 4 0 0 4 0 1,565 42,000 607 19 337 907 20 124 36 1 181 590 2,064 42,000 608 20 326 1,066 5 25 0 3 33 2,805 1,940 42,680 609 21 472 1,978 28 700 0 0 728 0 1,552 42,680 610 22 143 430 70 571 0 0 641 0 5,105 45,335 611 23 142 381 0 10 0 0 10 0 12,332 45,335 612 24 110 310 21 9 0 0 30 0 11,199 30,000 613 25 19 56 0 0 0 0 0 0 1,548 30,000 614 26 31 68 12 38 0 0 50 0 3,326 30,000 615 27 225 653 15 10 30 1 56 0 14,770 30,000 616 28 134 383 0 40 0 0 40 0 15,104 45,335 6 29 206 625 0 0 0 0 5,124 46,085 618 30 380 1,010 0 222 0 0 222 0 14,210 46,085 619 31 167 525 0 0 0 0 0 0 8,816 39,315 620 32 222 592 0 0 0 0 0 0 4,203 39,315 621 33 693 1,725 36 1,501 0 4 1,541 590 1,984 41,250 622 34 755 2,076 6 104 0 7 1 0 4,798 44,775 623 35 389 1,028 50 323 0 6 379 0 2,438 42,680 624 36 2,490 7,402 123 1,059 214 0 1,396 0 3,452 51,820 625 37 1,705 4,812 1 537 613 0 1,267 2,657 4,200 51,820 626 38 55 134 87 31 20 3 141 0 1,587 49,090 627 39 892 2,440 52 77 2 1 132 0 2,332 39,880 628 40 1,953 5,596 35 711 0 0 746 0 4,725 50,625 629 Jul 2008 C 12
Multi Moal Transportion u for Effingham Count Tabl C.9 2030 SE Da b TAZ, Continu APPENDIX C. Travl Dman Mol Dvlopmnt Emplomnt School TAZ Populion Rtail Srvic Manuf. Whol Total Enrollmnt Acrs Mian Incom Cntrio 41 696 2,130 0 212 0 0 212 0 4,731 68,200 630 42 602 1,859 0 13 0 0 13 0 6,856 42,000 631 43 602 1,939 0 0 0 0 2,294 49,090 632 44 857 2,634 15 440 0 3 458 0 6,668 42,680 633 45 787 2,169 76 1,6 205 9 1,466 0 5,881 51,820 634 46 2,780 7,502 1,114 2,087 1 1 3,203 0 4,263 55,565 635 47 156 452 0 10 0 0 10 0 14,783 49,090 636 48 279 693 9 68 0 1 78 0 12,574 45,335 637 49 284 792 0 11 1601 0 1,612 0 6,473 51,820 638 50 665 1,911 0 109 0 0 109 0 10,428 39,315 639 51 160 452 0 8 0 0 8 0 5,347 39,315 640 52 249 705 0 27 0 1 28 0 3,587 45,355 641 Bas Yar Ntwork Dvlopmnt Th mol ntwork was vlop b xning th ntwork of th travl man mol for Chham Count Inrsta Ns Analsis an Prioritizion Plan. Thrfor, th ntwork for Effingham Count covrs both Effingham an Chham Count. Figur C.2 isplas th bas ar 2001 ntwork. Th highwa ntwork consists of links an nos th rprsnt roawa sgmnts an inrsctions. Th tribus of links contain characristics of roawas such as fr flow sp, istanc, numbr of lans, ara tp (accoring to nsit of populion an mplomnt), facilit tp (similar to functional classificion) an capacit. Th tribus of nos contain positional, two imnsional x an coorinas to nabl th ntwork fil to b ispla pictoriall. FACILITY TYPE AND AREA TYPE. Iniviuall an in combinion ths two link tribus provi a framwork for organizing a ntwork into sub groups so th fr flow sp an capacit can b assign. In combinion with th istanc an numbr of lans, ths tribus constitu th bas lar of highwa ntwork a n to upa an appl th mol. Th facilit tp an ara tp finitions us in th ntwork an moling procss ar shown in Tabls C.10 an C.11. Jul 2008 C 13
01 R oa 47 4 Ol R i v h rk r R fi t L l R Pmbrok il s L f i l R 9 11 Bran ta a 46 on a 11 9 a 20 4 Ga igh w a 2 4 Egpt ß A Kilar $ Guton Tusculum è? En á? Jo h n r R Cart Mlrim Marlow Pinora Shawn Fort wart Militar Rsrvion 80 á? a t rg l Jul 2008 k l Scrvn IBulloch «Brooklt Bu 280 Librt 3 nt R a lt r ou R a rk nm l t D B ro o k oo Br C a 119 «I Pi n Bloomingal Faulkvill B a rr l o R illwll Chham Poolr P l oo ach P k w $ D Lo 46 2 6 01 Gorgia Ebnzr Garn Cit 0 8 0 Rincon Savannah m a lf T a 65 2 46 il l R 2.5 25 c a 0 B a 5 41 a a t 1 Jaspr 0 0 Al South Carolina a Louis v ir R a a 336 t 29 a 2 4 nc 62 7 8 Alt 4 6 2 w 0 10 Mils ± 78 2 a Long $ Bulloch $ Atlantic Ocan Fort wart Militar Rsrvion This map is inn for planning purposs onl. Sourc: GDOT, ESRI, an Jacobs Carr Burgss Railroas Consrvion Aras War (Outsi Effingham Count) Cit Limits Othr Count Bounar Effingham Count Bounar Othr Lars Othr Roas Collton a Rou / U.S. ighwa Inrsta Roa Ntwork Local Roa Minor Collctor Major Collctor Minor Arrial Inrsta Lgn Figur C.2 McIntosh Chham $ Jaspr ampton Chham Effingham Allnal Bran Librt Scrvn 2001 Ntwork Wan Appling Ttnall Evans Canlr Emanul Jnkins Burk Rgional Inst Effingham Count Transportion Plan Port Wntworth è? Clo C im D Loach P k w J Jim m n R Springfil ß A ampton 11 9 a 78 2 2001 Ntwork S 7 1 t ns Gr Offic of Planning S ta 67 rt A Pk a Fo l r o a nt R 21 P oo C ou w 39 0 rp k Roa 19 tr Count rr 1 Da n F or s v Ri a ra R 25 ir O l Elo a w Fa 13 a 21 Su lv 1 B 32 i t a c k R L it tl N R 59 0
Multi Moal Transportion u for Effingham Count Tabl C.10 Facilit Tp APPENDIX C. Travl Dman Mol Dvlopmnt Co Facilit Tp 1 Inrsta 2 Frwa 3 Exprsswa 4 Parkwa 6 Frwa to Frwa Ramp 7 Frwa Entranc Ramp 8 Frwa Exit Ramp 11 Principal Arrial Class I 12 Principal Arrial Class II 13 Minor Arrial Class I 14 Minor Arrial Class II 15 On Wa Arrial 21 Major Collctor 22 Minor Collctor 23 On Wa Collctor 30 Local Roa 32 Cntroi Connctor Tabl C.11 Ara Tp Co Ara Tp 1 igh Dnsit Urban 2 igh Dnsit Urban Commrcial 3 Urban Rsintial 4 Suburban Commrcial 5 Suburban Rsintial 6 Exurban 7 Rural CAPACITY Link capacitis for th mol ntwork ar obtain from a lookup tabl of pr lan hourl capacitis bas on facilit tp an ara tp. Th final link capacit is calcula b multipling th pr lan hourl capacit b th numbr of lans. Tabl C.12 isplas capacitis. SPEED. Link sp in th mol ntwork is riv from a sp lookup tabl bas on facilit tp an ara tp. Th sps ar shown in Tabl C.13. Jul 2008 C 15
Multi Moal Transportion u for Effingham Count Tabl C.12 ourl Capacit pr Lan APPENDIX C. Travl Dman Mol Dvlopmnt No Facilit Tp Ara Tp 1 2 3 4 5 6 7 1 Inrsta 1900 1900 2000 2000 2200 2200 2000 2 Frwa 1800 1800 1900 1900 2000 2000 1900 3 Exprsswa 1300 1300 1400 1400 1500 1500 1400 4 Parkwa 1200 1200 1300 1300 1400 1400 1300 6 Frwa to Frwa Ramp 1600 1600 1800 1800 1900 1900 1800 7 Frwa Entranc Ramp 1400 1400 00 00 1800 1800 00 8 Frwa Exit Ramp 1200 1200 1400 1400 1600 1600 1400 11 Principal Arrial Class I 1100 1000 1200 1200 1400 1400 1200 12 Principal Arrial Class II 900 900 1000 1000 1100 1100 1000 13 Minor Arrial Class I 800 800 900 900 1000 1000 900 14 Minor Arrial Class II 700 700 800 800 900 900 800 15 On Wa Arrial 750 750 850 850 950 950 850 21 Major Collctor 600 600 700 700 800 800 700 22 Minor Collctor 500 500 600 600 700 700 600 23 On Wa Collctor 550 550 650 650 750 750 650 30 Local Roa 400 400 500 500 600 600 500 32 Cntroi Connctor 0 0 0 0 0 0 0 Tabl C.13 Sp Tabl No Facilit Tp Ara Tp 1 2 3 4 5 6 7 1 Inrsta 55 60 60 60 60 70 70 2 Frwa 50 55 55 55 55 60 60 3 Exprsswa 50 50 50 50 55 55 55 4 Parkwa 45 50 50 50 50 55 55 6 Frwa to Frwa Ramp 55 55 55 55 55 55 55 7 Frwa Entranc Ramp 45 50 50 50 50 55 55 8 Frwa Exit Ramp 22 23 30 31 34 40 47 11 Principal Arrial Class I 25 28 33 34 37 47 52 12 Principal Arrial Class II 23 26 31 32 35 45 49 13 Minor Arrial Class I 22 23 30 31 34 40 47 14 Minor Arrial Class II 21 22 27 30 32 38 45 15 On Wa Arrial 23 26 30 32 35 42 48 21 Major Collctor 18 21 27 29 34 42 22 Minor Collctor 14 15 18 24 26 30 40 23 On Wa Collctor 18 21 27 29 34 42 30 Local Roa 14 14 18 22 28 35 32 Cntroi Connctor 14 14 18 22 28 35 Jul 2008 C 16
Multi Moal Transportion u for Effingham Count APPENDIX C. Travl Dman Mol Dvlopmnt Bas Yar Mol Calibrion Th bas ar 2001 mol was calibra to rplica 2001 traffic counts from GDOT. Th mol valiion rsults ar summariz as blow. PERCENT DEVIATION BY LINK A rasonabl xpction is for a mol to accural stima numbr of lans rquir for a facilit to provi a spcifi lvl of srvic. As annual avrag ail traffic (AADT) on a facilit incrass, th xpc accurac of a mol incrass as wll. Figur C.3 shows viion btwn 2001 volums assign b th mol with obsrv traffic counts. Effingham Count Bas Yar 2001 Travl Dman Mol 2.20 2.00 Prcnt Dviion (Mol Volum vs. Count) 1.80 1.60 1.40 1.20 1.00 0.80 0.60 0.40 0.20 0.00 0 5000 10000 15000 20000 25000 30000 35000 40000 45000 50000 Traffic Count Prcnt Dviion from Count Maximum Dsirabl Dviion Figur C.3 Prcnt Dviion in 2001 Mol Th prcnt viion is calcula as follows: Prcnt Dviion = (Bas Yar Volum Assign Bas Yar Count)/Bas Yar Count Maximum sir viion, rprsn b a thick, ownwar sloping curv, is rlivl high for low volum facilitis an much smallr for highr volum links. Th link lvl mol viion points ar concntra in th lowr lft cornr of th graph, blow th maximum sirabl viion lin. Th Jul 2008 C
Multi Moal Transportion u for Effingham Count APPENDIX C. Travl Dman Mol Dvlopmnt graph is compris of mol volums vrsus counts viions from 68 links on th highwa ntwork. Ths a points illustra (1) th viion of 91% st links in th highwa ntwork ar within maximum sirabl viion, an (2) six links whos viion points ar loca abov th maximum sirabl viion; howvr, ths six traffic counts ar blow 2,500 vhicls pr a. SCREENLINE COMPARISON Svn scrnlins wr slc to inrcpt major traffic flows through Effingham Count. Assign volums in 2001 mol ar compar with 2001 traffic counts ach scrnlin crossing. In valuing scrnlins uring a mol calibrion, th maximum sirabl viion is from NCRP 255. Figur C.4 picts ach scrnlin us in th calibrion an valiion of th bas ar mol. Tabl C.14 summarizs scrnlin analsis. Tabl C.14 Scrnlin Analsis Scrnlin Dscription Count Volum Prcnt Dviion Maximum Dsirabl Dviion* 1 South of Count lin 8,240 10,050 22% +/-42% 2 North of Effingham Count 8,450 9,530 14% +/-41% 3 North of SR 119 16,550 18,070 9% +/-31% 4 South of Effingham Count 32,400 33,950 5% +/-23% 5 North of Chham Count lin 71,850 77,590 8% +/-16% 6 East of SR 12,220 10,700-12% +/-35% 7 East of SR 21 6,410 8,010 25% +/-46% Total 156,120 167,900 8% +/-12% * FWA Mol Calibrion an Rasonablnss Chcking Manual PERCENT ERROR COUNTYWIDE Prcnt rror is th total assign traffic volums ivi b th total coun traffic volums for all links th hav traffic counts. Th prcnt rror ssmwi shoul b lss than fiv prcnt. Th prcnt rror for th Effingham Count bas ar mol is two prcnt, which is within th targt fiv prcnt. PERCENT DEVIATION BY VOLUME GROUP Assignmnt b volum groups is us to assss mol prformanc against aggrga traffic counts on roas cagoriz b traffic volums. Tabl C.15 compars th mol prformanc to rcommn FWA sirabl rangs for th iffrnt volum groups. As this tabl shows, all mol volums fall within th rcommn guilins. Jul 2008 C 18
01 R oa 47 4 Ol R i v h rk r R l R Pmbrok il s L f i l R 9 11 Bran ta a 46 on 2 a 11 9 a 20 4 Ga igh w a 3 6 2 4 Egpt ß A Kilar 7 $ Guton Tusculum è? En á? Jo h n r R Cart Mlrim Marlow Pinora Shawn Fort wart Militar Rsrvion 80 á? a t rg l Jul 2008 fi t L 1 Scrvn Bulloch k l «I Brooklt Bu 280 Librt 3 nt R a lt r ou R a rk nm l t D B ro o k oo Br C a 119 «I Pi n Bloomingal Faulkvill B a rr l o R illwll Chham Poolr P l oo ach P k w $ D Lo 46 2 6 01 Gorgia Ebnzr Garn Cit 0 8 0 Rincon Savannah m a lf T a il l R 25 c a 2.5 a Louis v ir R 65 2 5 46 0 B a 5 41 a a t 1 Jaspr 0 0 Al South Carolina 4 a a 336 t 29 a 2 4 nc 62 7 8 Alt 4 6 2 w 0 10 Mils ± 78 2 a Long $ Bulloch Inrsta Scrnlin Numbr Scrnlins 6-7 Scrnlins 1-5 Lgn Figur C.4 Atlantic Ocan Fort wart Militar Rsrvion This map is inn for planning purposs onl. Sourc: GDOT, ESRI, an Jacobs Carr Burgss Railroas Consrvion Aras War (Outsi Effingham Count) Cit Limits Othr Count Bounar Effingham Count Bounar Othr Lars Othr Roas Collton a Rou / U.S. ighwa Roa Ntwork # $ McIntosh Chham $ Jaspr ampton Chham Effingham Allnal Bran Librt Scrvn Scrnlins Wan Appling Ttnall Evans Canlr Emanul Jnkins Burk Rgional Inst Effingham Count Transportion Plan Port Wntworth è? Clo C im D Loach P k w J Jim m n R Springfil ß A ampton 11 9 a 78 2 Scrnlins for 2001 Ntwork S 7 1 t ns Gr Offic of Planning S ta 67 rt A Pk a Fo l r o a nt R 21 P oo C ou w 39 0 rp k Roa 19 tr Count rr 1 Da n F or s v Ri a ra R 25 ir O l Elo a w Fa 13 a 21 Su lv 1 B 32 i t a c k R L it tl N R 59 0
Multi Moal Transportion u for Effingham Count Tabl C.15 Prcnt Dviion b Volum Group APPENDIX C. Travl Dman Mol Dvlopmnt Volum Group Links with Counts Man Count Man Mol Volum Prcnt Dviion Maximum Dsirabl Dviion* <=1000 7 640 1,020 59% +/-60% 1,000-2,500 1,850 2,270 23% +/-47% 2,500-5,000 22 3,760 3,870 3% +/-36% 5,000-10,000 12 6,160 5,750-7% +/-29% 10,000-25,000 5 16,660 16,740 0% +/-25% >25,000 5 29,700 29,830 0% +/-22% All Links 68 6,240 6,360 2% * FWA Mol Calibrion an Rasonablnss Chcking Manual PERCENT DEVIATION BY FUNCTIONAL CLASSIFICATION Tabl C.16 compars mol prformanc to rcommn FWA sirabl rangs for assignmnt b roawa functional classificion. As th tabl shows, all mol volums fall within th rcommn guilins. Tabl C.16 Prcnt Dviion b Functional Classificion Functional Classificion Links with Counts Man Count Man Mol Volum Prcnt Dviion Maximum Dsirabl Dviion* Frwa 3 31,790 33,080 4% +/-7% Principal Arrial 0 0 0 0% +/-10% Minor Arrial 26 7,920 7,920 0% +/-15% Collctor 39 3,160 3,270 4% +/-25% All Links 68 6,240 6,360 2% * FWA Mol Calibrion an Rasonablnss Chcking Manual CORRELATION COEFFICIENT A corrlion cofficint is calcula using pairs of mol volums an traffic counts, an shoul tpicall b grar than 0.88. Th corrlion cofficint for th bas ar mol is 0.96, which is abov th accptabl thrshol. ROOT MEAN SQUARE ERROR Root Man Squar Error (RMSE) is a gnral stistical masur of how clos th mol volums to traffic counts. With all availabl traffic counts in th ntwork, th RMSE is calcula to b 25%. A suggs appropria aggrga RMSE is lss than 30%; thrfor, th rsult is within th accptabl thrshol. Jul 2008 C 20
Multi Moal Transportion u for Effingham Count APPENDIX C. Travl Dman Mol Dvlopmnt DETERMINE ROADWAY DEFICIENCIES Dficint sctions of roawa ar intifi b lvl of srvic (LOS) on all roawas contain in a highwa ntwork. LOS is us b traffic nginrs an transportion plannrs to scrib th gr of manuvrabilit an comfort th motorists coul xpct riving on a particular sction of roa. LOS is from A to F, with LOS A rprsntiv of fr flow oprion conitions an availabl spac for rivrs to manuvr safl on th roa. As LOS rops towar F, thr is incrasingl lss spac availabl for motorists to manuvr. Whn LOS rachs F, thr is not an room lft on th roa for othr vhicl an thr ar stop an go conitions. Tpicall, transportion cision makrs intif projcts an mak plans th will rsult in accptabl LOS. Volum to capacit (v/c) rio is calcula for ach sction of roas in th ntwork. LOS E is quivalnt to a v/c rio of 1.00. Sinc link capacitis in th mol ar bas on LOS E srvic volums, LOS F bgins whn th forcas volums bgin to consum 100% of th LOS E capacit on a facilit. Tabl C. shows thrshol of v/c rio in rlion with LOS. LOS C is accptabl LOS for intifing ficint roas or corriors in vloping th Effingham Count Transportion Plan. Thrfor, th sctions of roas with v/c ovr 0.70 ar consir capacit ficinc. Tabl C. LOS an v/c Rio LOS v/c Rio A or B or C <0.70 D 0.7 to 0.85 E 0.85 to 1.00 F >1.00 2030 E+C Mol Afr having calibra an valia th bas ar 2001 mol, JCB us it to assist GDOT an Effingham Count in valuing of alrnivs in futur ar 2030 transportion ssms. Th E+C (xisting plus commit) ntwork rprsnts xisting an futur transportion infrastructur for which a commit funing sourc xists, an tpicall inclus programm projcts in th most currnt rgional Transportion Improvmnt Program (TIP). In th cas of th Effingham Count mol, 2030 E+C projcts ar currntl programm in th sta s TIP, th STIP, an inclu projcts for which right of wa has bn fun or purchas or funing for construction is commit. Th 2030 E+C mol is run with 2030 SE a, an is us to forcast an analz th conition of transportion infrastructur bas on currnt lvls of invstmnt. It highlights aras of futur n bas on fin prformanc masurs such as congstion, travl tim or la. Jul 2008 C 21
Multi Moal Transportion u for Effingham Count APPENDIX C. Travl Dman Mol Dvlopmnt 2030 Buil Mol Afr valuing 2030 E+C mol rsults an intifing capacit ficint roawas, JCB work with GDOT an Effingham Count to rmin pontial capacit improvmnt projcts such as nw roas or wining roas. JCB appli th mol to valua th pontial projcts. Th mol rsults show btr conition with th rcommn projcts in Effingham Count. Tabl6.2 in th rport shows th rcommn projcts with scriptions. Jul 2008 C 22