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T.P.D.M.V.2.4 4.5.17 Superelevation and Cross fa 11 4.5.17-1 Superelevation is not required on the circulatory carriageways of roundabouts whereas crossfall is required, to drain surface water, but on the approaches and exits superelevation can assist drivers to negotiate the associated curves. 4.5*17*2 On entry the degree of superelevation should be appropriate to the speed of vehicles, as they approach the roundabout, but should not exceed 5%. It should be reduced to the crossfall required merely for drainage in the vicinity of the "Give Way tt line, since with adequate advance signing and entry deflection, speeds on the approaches should be sufficiently reduced. 4.5.17.3 On exits, superelevation may be provided to assist vehicles in accelerating away from the roundabout* However, as with entries, crossfalls adjacent to the roundabout should be kept to the minimum required for drainage. 4*5.17*4 Normal crossfall for drainage on roundabouts should be 2.QJ5 and not exceed 3.0J. To avoid ponding, longitudinal edge profiles should be graded at not less than 0.67JJ desirable, and 0.5Jf absolute minimum. 4.5.17*5 On the circulatory carriageway the values of crossfall should be governed by drainage requirements. However the direction of crossfall, particularly at normal roundabouts, should be arranged to assist circulating vehicles. Hence the carriageway adjacent to the central island should slope toward the central island while the carriageway adjacent to the outside perimeter will slope toward it. The crown line thus formed may be a straight line joining the entry and exit deflection islands or a line dividing the circulatory carriageway in the proportion 2:1 internal to external as shown in Diagram No. 4.5.17.1. Alternatively, a subsidiary crown line, as shown on Diagram No. 4.5*17.2, may be used to avoid excessive changes in crossfall at the single crownline. Maximum recommended algebraic difference in crossfall across the crown line is 5$, and lesser values are desirable. 4.5*17*6 Adverse crossfall should be eliminated from the paths of the main traffic movements at normal roundabouts* Mini roundabouts and smaller normal roundabouts in urban areas are often superimposed upon existing pavement profiles and in these cases, the cross section of the existing roads will influence crossfalls at the roundabout. T-junctions require particular attention. Some adverse crossfall can be accepted in order to fit the existing levels provided approach speeds are low.
TP.O.M.V.2.4 (a) JOINING TRAFFIC DEFLECTION ISLANDS CROWN LINE (a) SMOOTH CROWN \ X—X NOT TO SCALE CROSSFALL DESIGN USING ONE CROWN LINE DIAGRAM 4.5.17.1 A
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§ • abc (*H#28572048 SHU ' 1999/
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Transport Planning & Design Manual
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T.P.D.M.V.2.1 - ' »1 PURPOSE 1 -1
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VOLUME1jTUNNELS Chapters 1. Introdu
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T.P.D.M.V.2.2 (Al/2001) Section Con
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T.P.D.M.V.2.2 (Al/2001) 2.1 Referen
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T.P.D.M.V.2.2 (Al/2001) Table 2.2.1
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T.P.D.M.V.2.2 (Al/2001) Table 2.2.1
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T.P.D.M.V.2.2 (Al/2001) Distance be
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T.P.D.M.V.2.2 (Al/2001) Table 2.2.2
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T P.D.M.V.2.2 (Al/2001) Table 2.2.2
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T.P.D.M.V.2.2 (Al/2001) Table 2.2.2
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MINIMUM KERB TO KERB CLEARANCE MINI
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MINIMUM KERB CLEARANCE TO KERB MINI
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MINIMUM WALL TO WALL CLEARANCE MINI
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T.P.D.M.V.2.2 BUS DAIMLER FL££TUN
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T P n Twf V 7 T.P.D.M.V.2.2 (Al/20
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T.P.D.M.V.2.2 T.P.D.M.V.2.2 (Al/200
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T.P.D.M.V.2.2 (Al/2001) 2.4 Design
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T.P.D.M.V.2.2 (A 1/2001) 2.4.2 Esti
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T.P.D.M.V.2.2 2.4.3 Peak Hourly Flo
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Revised in December 2001 TRANSPORT
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T.P.D.M.V.2.3 (Al/2001) 3.7 Pedestr
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T.P.D.M.V.2.3 (Al/2001) Diagrams 3.
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T.PD.M.V.2.3 (Al/2001) 22. Providin
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T.PD.M.V.2.3 (Al/2001) 33 Road Alig
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T.P.D.M.V.2.3 (Al/2001) 33.2 Design
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T.P.D.M.V.2.3 (Al/2001) For Radii b
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T.P.D.M.V.2.3 (Al/2001) Table 3.3.4
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T.P.D.M.V.2.3 (Al/2001) (b) For 80
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T.PJD.M.V.2.3 (Al/2001) 3.3.7 Verti
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T.P.D.M.V.2.3 (Al/2001) 33.8 Climbi
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tft D.M,V. 2.J 10Q1 'Read Arrows'tr
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T,R0,H*V. 23 mOoubit contiimqys whi
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T.P.D.M.V.2.3 0 10,000 20,000 3WJQO
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T.P.D.M.V.23 (Al/2001) 3.4. The Roa
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T.P.D.M.V.2.3 (Al/2001) 3.4.2.7 The
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T.P.D.M.V.2.3 (Al/2001) 3.4.4 Widen
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TYPE A TYPE FOR LIGHT AND MEDIUM GO
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T.P.D.M.V.2.3 (Al/2001) 3.4.7 Centr
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T.PD.M.V.2.3 (Al/2001) 3.4.7.13 Isl
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T.P.D.M.V.2.3 (Al/2001) 3.4.9 Verge
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T.P.D.M.V.2.3 (Al/2001) (vi) there
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T.P.D.M.V.2.3 (Al/2001) 3.4.11 Foot
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T.P.D.M.V.2.3 (Al/2001) (vi) Advice
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T.P.D.M.V.2.3 (A1/2001) 7SO OR 1Q O
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T.RD.M.V. rwwi¥f«%i ** SE6 SEOTtQ
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T.RD.M.V, 2,3 (A1/2001) oaa, VIR6E
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T.P.D.M.V.2.3 3.5 Highway Clearance
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T.PD.M.V.2.3 (Al/2001) 3.5.2 Horizo
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T.PD.M.V.2.3 (Al/2001) 3.6.2 Locati
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T.RD.M.V.2.3 LOT BOUNDARY PRIVATE E
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T.P.D.M.V.2.3 t N X X X «. I B VIS
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T.P.D.M.V.2.3 (Al/2001) (c) (d) Nee
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T.P.D.M.V.2.3 (Al/2001) 3.7.2 At-Gr
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T.PD.M.V.2.3 (Al/2001) 3.7.3 Zebra
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T.P.D.M.V.2.3 GJVE WAY UNE o 4U «4
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T.P.D.M.V.2.3 (Al/2001) 3.7.3.11 De
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T.P.D.M.V.2.3 (Al/2001) 3.7.4.10 Th
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T.P.D.M.V.2.3 (Al/2001) 3.7.6 Uncon
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T.PD.M.V.2.3 (Al/2001) 3.7.7.7 Tabl
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T.P.D.M.V.2.3 Maitfri Cyefe Trade T
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T.P.D.M.V.2.3 (Al/2001) Table 3.7.7
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T.P.D.M.V.2.3 (Al/2001) 3.7.8 Escal
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T.P.D.M.V.2.3 (Al/2001) 3.8.2 Provi
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T.P.D.M. V.2.3 (Al/2001) 3.8.3.9 No
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T.P.D.M. V.2.3 (Al/2001) 3.9 Railin
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T.P.D.M. V.2.3 (Al/2001) 3.9.2.9 Ra
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T.P.D.M. V.2.3 (Al/2001) 3.9.3 Barr
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T.PD.M. V.2.3 (Al/2001) 3.9.3.8 The
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T.P.D.M. V.2.3 (Al/2001) 3.9.3.26 A
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T.P.D.M. V.2.3 (Al/2001) 3.9.3.36 T
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T.PD.M. V.2.3 (Al/2001) 3.9.4.9 Sin
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T.P.D.M. V.2.3 (Al/2001) 3.10.2 Roa
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T.P.D.M. V.2.3 (Al/2001) TUNNEL iim
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T.P.D.M. V.2.3 (Al/2001) 3.11 Singl
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T.P.D.M. V.2.3 (Al/2001) 3.11.4 Hor
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T.P.D.M. V.2.3 (Al/2001) 3.11.7 Min
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T.P.D.M. V.2.3 (Al/2001) 3.1 L9 Pas
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Revised in December 2001 TRANSPORT
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T.P.D.M.V.2.4 4.5.13 Roundabout Exi
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T.P.D.M.V.2.4 4.6.9.5 Diverging Lan
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T.P.D.M.V.2.4 4.2 Junction Design -
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T.P.D.M.V.2.4 (Al/2001) Mrnor Road
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T.P.D.M.V.2.4 4.2.5 Delay 4.2.5.1 O
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T.P.D.M.V.2.4 4.2.7 Economic Consid
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T.P.D.M.V.2.4 (Al/2001) 4.2.9 Choic
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T.P.D.M.V.2.4 (Al/2001) 4,2.10 Spac
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T.P.D.M.V.2.4 4.3.2 Types of Priori
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4*3*3 Siting of Priority Junctions
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4.3.5 Pedestrian Facilities at Prio
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T.P.DJM.V.2.4 4,3.6*6 The predictiv
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T.P.D.M*V.2.4 4.3.8 Visibility Spla
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A1/88 FOR VEHICLE WAITING TO TURN R
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T.P.O.M V.2.4. FRONT KERB FRONT KER
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T.P.D.M.V.2.4 4.3.9.4 For shadow is
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T.P.D.M.V.2.4 4*3»10 Left TurningL
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T.P.D.M.V.2.4 ^•3*12 Traffic Isla
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T.P.D.M.V.2.4 4.3.14 Corner Badil 4
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T.P.D.M.V.2.4 4,3*16 Recommended La
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T.P.D.M.V.2.4 Diagram No. 4.3.16.8
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T*P.D*M.V.2.4 (v) For left hand spl
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T. P.D M V 24 3.65 CE=E 3.65- 1s25t
Page 218 and 219: T. P.D.M V.2.4 Keep Leff sign Keep
Page 220 and 221: T. P D M V 24 Compound curve for di
Page 222 and 223: T. P. D.M V.2 4 ^ —-• — —"
Page 224 and 225: T. P.D.M.V 24 1:20 taper RIGHT/LEFT
Page 226 and 227: T. P.D.M.V.2.4 1*25 taper 1 Diagram
Page 228: T P D M V 24 125 taper •UphiU gra
Page 232 and 233: T.P.D.M*V*2.4 Signal Controlled Jun
Page 234 and 235: 4.5.2 Normal Roundabouts 4.5.2.1 No
Page 236 and 237: NORMAL ROUNDABOUT T.P.O.M.V. 2.4. T
Page 238 and 239: T.P.O.M.V. 2.4. CONTIGUOUS DOUBLE R
Page 240 and 241: T.P.D.M.V.2.4. TWO BRIDGE ROUNDABOU
Page 242 and 243: TP.D.M.V 2.4. STRAIGHT SECTION PROV
Page 244 and 245: T.P.D«M.V*2.4 4*5.8 Pedestrian t C
Page 246 and 247: T.P.D.M.7.2JI 4*5.9*** The predicti
Page 248 and 249: T.P.D.M.V.2.4 4.5.11 Visibility 4.5
Page 250 and 251: DESIRABLE/MINIMUM VISIBILITY DISTAN
Page 252 and 253: T.P.O.M.V. 2 .4. HALF LANE WIDTH DI
Page 254 and 255: T.RD.M.V.2.4. MINIMUM AREA OVER WHI
Page 256 and 257: T.P.D.M.V.2.4 in the entry as shown
Page 258 and 259: .P.O.M.V.2>. ENTRY DEFLECTION ACHIE
Page 260 and 261: T.P.D.M.V.2.4 4.5*13 Roundabout Exi
Page 262 and 263: T.P.D.M.V.2.4 4*5.15 Inscribed Circ
Page 264 and 265: T.P.D.M.V.2.4 4.5.16 Segregated Lef
Page 266 and 267: Note:- This is not a recommendation
Page 270 and 271: (b) DIVIDING CIRCULATORY CARRIAGEWA
Page 272 and 273: T.P.DJM.V.2.4 4.5.18 Signing and Li
Page 274 and 275: T.P.B.M.7.2.4 4.6 Grade Separated J
Page 276 and 277: T.P.D.M.7.2.4 4.6.2.7 The Partial C
Page 278 and 279: 4*6*3 Siting of Grade Separated Jun
Page 280 and 281: 4,6.5 General Layout Requirements 4
Page 282 and 283: T.P.D.M.V.2.4 ^6* 7 Slip Roads 4.6.
Page 284 and 285: T.P.D.M.V.2.4 4*6.7.12 The width of
Page 286 and 287: T.P.O.M.V.2.4. FIG. A 100 EDGE LINE
Page 288 and 289: T.P.D.M.V.2.4 4.6.8.7 The method of
Page 290 and 291: T.P.D.M.V.2.4 downstream. The layou
Page 292 and 293: DIRECT ENTRY MERGING UN£ (TYPES 2
Page 294: T.P.D.H.V. 2.4 TO SUIT SITE ADDITIO
Page 297 and 298: T*P*D.M.V.2.4 4.6.9*7 The design fl
Page 302 and 303: I.P.O.M.V.2.
Page 304 and 305: T,P*D.M*V.2*4 4.6.10 Weaving Sectio
Page 306 and 307: 44-
Page 308 and 309: T.P.D.M.V.2.4 APPENDIX 1 ! Calculat
Page 310 and 311: T.P.D.M.V.2.4 If right and left tur
Page 312 and 313: T.P.D.M.V.2.4 4» Applying the stre
Page 314 and 315: T.P.D.M.V.2.4 The toui parts of dmw
Page 316 and 317: T.P.D.M.V.2.4 APPENDIX 2 Calculatio
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T.P.D.M.V.2.4 D=the inscribed circl
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T.P.D.M.V.2.H (v) The vehicle proce
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T.P.D.M.V.2.4 4. Using these design
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T.P.D.M.V.2.4 APPENDIX 3 Examples o
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T*P*D*M.V.2.4 The average gradient
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Revised in March 2002 TRANSPORT PLA
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T.P.D.M. V.2.5 5.1 References 1. Ch
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T.P.D.M. V.2.5 (Al/2002) 5.3 Petrol
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T.P.D.M. V.2.5 (Al/2002) 53.2 Layou
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T.P.D.M. V.2.5 5.4 Additional Speed
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T.P.D.M. V.2.5 (Al/2002) 5.43 Road
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T.P.D.M. V.2.5 (Al/2002) (vii) With
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1 R D. M, V. 2.5 Edge of Carriagewa
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T.P.D.M. V.2.5 (Al/2002) 5.4.4 Tran
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T.P.D.M. V.2.5 (Al/2002) 5.4.5.8 Us
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T.P.D.M. V.2.5 5.4.6.11 As with rum
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T.P.D.M. V.2.5 (Al/2002) 5.5.2 Gene
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T.P.D.M. V.2.5 (Al/2002) 5.6.2 Aspe
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T.P.D.M. V.2.5 (Al/2002) 5.6.2.12 W
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T.P.D.M. V.2.5 (Al/2002) 5.6.3.3 Tr
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Revised in March 2002 TRANSPORT PLA
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T.P.DJVLV.2.6 (Al/2002) Diagrams 6.
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T.RD.M.V.2.6 (Al/2002) 6.2 Introduc
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T.RD.M.V.2.6 (Al/2002) 63 Expresswa
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T.RD.M.V.2.6 (Al/2002) 63.2 Horizon
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NOTES 1. FOR DETAILS OF ROAD STUDS
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1. FOR DETAILS OF ROAD STUDS AND MA
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T.P.D.M.V.2.6 (A1/2002) CENTRAL RES
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T.P.D.M.V.2.6 (A1/2002) •FACE OF
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10&Q BOUMQA8Y FENCE 1 38UNQARY FENC
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T.RD.M.V.2.6 (Al/2002) v) earth mou
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T.RD.M.V.2.6 (Al/2002) 6.3,4 Draina
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T.RD.M. V.2.6 (Al/2002) 63.6 Juncti
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T.P.D.M.V.2.6 (A172002) DIRECT ENTR
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MIN. LANE WIDTH 3.7m ISLAND WIDTH 2
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T.P.D.M.V.2.6 (A172002) 70 NOSE DIR
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T.P.D.M.V.2.6 (A1/2002) 130 70 NOSE
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T.RD.M.V.2.6 6.4 Permanent Signs an
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T.P.D.M.V.2.6 (Al/2002) i l FOR 2 L
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T.RD.M.V.2.6 (Al/2002) 6.4.1.10 Det
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T.PD.M.V.2.6 (Al/2002) 6.4.2 Direct
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T.P.D.M.V.2.6 (Al/2002) (a) Layout
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T.P.D.M.V.2.6 (Al/2002) 6.43 Chaina
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TJP.D.M.V.2.6 (Al/2002) 6.4.4.7 In
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T.P.D.MV.2.6 (Al/2002) 6.6 Maintena
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T.P.D.M.V.2.6 (A1/2002) BEARS MINOR
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T.P.D.M.V.2.6 (Al/2002) 6.7.2.9 Whe
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T.P.D.M. V.2.6 (Al/2002) 6,8.2 Acti
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