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4*3*3 Siting of Priority Junctions 4,3*3.1 Where possible it is preferable to site junctions on level ground or in sags rather than at or near the crest of hills* Drivers approaching a junction on an uphill gradient have difficulty in appreciating the junction layout whereas when they are approaching on a down gradient they have a good view of the situation ahead, 4.3*3.2 On curved sections of major roads, minor roads should be brought in on the outside of curves if possible* This is especially important on climbing lane sections or dual carriageways. 4.3.3*3 On single carriageways where overtaking opportunity is limited, care must be taken in siting shadow islands to avoid these sections being used for through route overtaking manoeuvres* 4.3*3*4 The number of junctions should be kept to a minimum by collecting lightly trafficked accesses into a service road which can form a single junction with the major road*
T.P.D.M.V.2.4 4.3.4 Safety at Priority Junctions 4.3.4,1 As stated in paragraph 4,2.6.1 In the United Kingdom 57% of all injury accidents occur at junctions. Just over half of these occur at priority junctions. It has been found that for the same major and minor road flows priority control almost invariably produces more accidents than other junction types and that the accidents are more serious, The accidents mainly involve right turning vehicles which feature in 90$ of accidents, equally divided into right turns to and right turns from the major road. 4.3-4.2 Again using recent statistics from the United Kingdom certain junction improvements have been found to have the following effects r Installation of shadow islands on single carriageway roads has reduced accidents by about 403f. The replacement of rural crossroads by a staggered junction has reduced accidents by about 60JC. The installation of deflection islands on the minor road approaches to rural crossroads has reduced accidents by about 50%. Other in^rovements which have been found to significantly reduce accidents include : restriction of turning movements, improvement to visibility, installation of guardrails and pedestrian refuges and the provision of skid resistant material. It is intended that more detailed advice on accidents at all junctions based on statistics collected in the Territory will be presented in Yolume V - Accident Analysis & Prevention.
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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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Page 226 and 227: T. P.D.M.V.2.4 1*25 taper 1 Diagram
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T.P.D.M.V.2.4. TWO BRIDGE ROUNDABOU
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TP.D.M.V 2.4. STRAIGHT SECTION PROV
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T.P.D«M.V*2.4 4*5.8 Pedestrian t C
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T.P.D.M.7.2JI 4*5.9*** The predicti
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T.P.D.M.V.2.4 4.5.11 Visibility 4.5
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DESIRABLE/MINIMUM VISIBILITY DISTAN
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T.P.O.M.V. 2 .4. HALF LANE WIDTH DI
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T.RD.M.V.2.4. MINIMUM AREA OVER WHI
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T.P.D.M.V.2.4 in the entry as shown
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.P.O.M.V.2>. ENTRY DEFLECTION ACHIE
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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*5.15 Inscribed Circ
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T.P.D.M.V.2.4 4.5.16 Segregated Lef
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Note:- This is not a recommendation
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T.P.D.M.V.2.4 4.5.17 Superelevation
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(b) DIVIDING CIRCULATORY CARRIAGEWA
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T.P.DJM.V.2.4 4.5.18 Signing and Li
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T.P.B.M.7.2.4 4.6 Grade Separated J
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T.P.D.M.7.2.4 4.6.2.7 The Partial C
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4*6*3 Siting of Grade Separated Jun
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4,6.5 General Layout Requirements 4
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T.P.D.M.V.2.4 ^6* 7 Slip Roads 4.6.
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T.P.D.M.V.2.4 4*6.7.12 The width of
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T.P.O.M.V.2.4. FIG. A 100 EDGE LINE
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T.P.D.M.V.2.4 4.6.8.7 The method of
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T.P.D.M.V.2.4 downstream. The layou
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DIRECT ENTRY MERGING UN£ (TYPES 2
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T.P.D.H.V. 2.4 TO SUIT SITE ADDITIO
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T*P*D.M.V.2.4 4.6.9*7 The design fl
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I.P.O.M.V.2.
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T,P*D.M*V.2*4 4.6.10 Weaving Sectio
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44-
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T.P.D.M.V.2.4 APPENDIX 1 ! Calculat
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T.P.D.M.V.2.4 If right and left tur
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T.P.D.M.V.2.4 4» Applying the stre
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T.P.D.M.V.2.4 The toui parts of dmw
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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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