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PDF (DX094490.pdf) - White Rose Etheses Online

PDF (DX094490.pdf) - White Rose Etheses Online

PDF (DX094490.pdf) - White Rose Etheses

A COMPUTER SIMULATION STUDY OF THE EFFECTS OF FLARING AND TURNING MOVEMENTS ON ROUNDABOUT ENTRY PERFORMANCE by Theodoros Natsinas Thesis submitted for the degree of Ph.D. Department of Civil and Structural Engineering University of Sheffield November 1982

  • Page 3 and 4: i ACKNOWLEDGEMENTS I would like to
  • Page 5 and 6: iii delay was obtained for combinat
  • Page 7 and 8: APPENDIX 2 2a 2b APPENDIX 3 V 4.5.2
  • Page 9 and 10: vii 6.5 The Effective Number of Lan
  • Page 11 and 12: CHAPTER 1 INTRODUCTION
  • Page 13 and 14: ative ways of improving the perform
  • Page 15 and 16: 4. No restrictions were introduced
  • Page 17 and 18: 2.1 Introduction 6 Roundabouts as a
  • Page 19 and 20: especially in urban areas. 8 At the
  • Page 21 and 22: 10 Swindon, Sheffield, Halesowen, H
  • Page 23 and 24: 12 Since then a number of alternati
  • Page 25 and 26: following equation 2Q1 = Q1/1100 e
  • Page 27 and 28: 16 were assumed to be equal. A valu
  • Page 29 and 30: 18 Blackmore reported that the high
  • Page 31 and 32: 20 Philbrick concluded that the new
  • Page 33 and 34: 22 the priority rule was introduced
  • Page 35 and 36: 24 2.8 The Estimation of Delay The
  • Page 37 and 38: £ = p /( l - p). variable) by: 26
  • Page 39 and 40: 28 q = 1O8w(1+) (1w L / /\\ e En(c'
  • Page 41: 30 EXAMPLES OF SMALL ROUNDABOUT LAY
  • Page 44 and 45: *. c'... o .uou, 4.' c.0 l .- >1 a)
  • Page 46 and 47: B. 4 way Scissor N.\\\\ Junction. -
  • Page 48 and 49: a, a, a L 37 11 / Steady state / Tr
  • Page 50 and 51: Introduction 39 The development of
  • Page 52 and 53:

    41 flow at the Arundel Gate entry.

  • Page 54 and 55:

    43 all three sites. It should be no

  • Page 56 and 57:

    El (0 a) H 0 04 H N 4-JO) rj '-1 a)

  • Page 58 and 59:

    47 TABLE 3.3 Entry Total flow Flow

  • Page 60 and 61:

    49 Figure 3.2 Castle Square Roundab

  • Page 62 and 63:

    LI ' iA •ãE / /\ L. 1/,' 51 ,-.-

  • Page 64 and 65:

    4.1 Introduction 62 The computer pr

  • Page 66 and 67:

    64 Cooper et al (1977), Wennell and

  • Page 68 and 69:

    66 q: the major road (circulating)

  • Page 70 and 71:

    68 and their method estimates the p

  • Page 72 and 73:

    70 that the simplified models (1) a

  • Page 74 and 75:

    72 on roundabout performance during

  • Page 76 and 77:

    74 (iv) after estimating q 5 and L,

  • Page 78 and 79:

    76 This is useful in providing a di

  • Page 80 and 81:

    78 Some aspects of T-junction opera

  • Page 82 and 83:

    80 However, the values he reports a

  • Page 84 and 85:

    82 normality assumption of any line

  • Page 86 and 87:

    as following: 84 "Let y, y 2 , ...,

  • Page 88 and 89:

    86 the pattern of the circulating f

  • Page 90 and 91:

    88 Armitage and McDonald's two-line

  • Page 92 and 93:

    90 vehicles than larger ones. Two w

  • Page 94 and 95:

    92 section, this did not allow a co

  • Page 96 and 97:

    94 the abstraction of the accepted

  • Page 98 and 99:

    96 between the predictions for each

  • Page 100 and 101:

    98 counted, while interval ones des

  • Page 102 and 103:

    100 increases. At high flow situati

  • Page 104 and 105:

    102 Roundabout were analysed to pro

  • Page 106 and 107:

    104 the study sites. The headways p

  • Page 108 and 109:

    14 15 18 19 22 23 30 31 40 41 106 T

  • Page 110 and 111:

    0 .r.I 4) a) 4) a) 0 "-I 4) a) 4.)

  • Page 112 and 113:

    (1) (ii) a 110 TABLE 4.4 all values

  • Page 114 and 115:

    112 TABLE 4.6 NT TN a 1 2.07 2.27 2

  • Page 116 and 117:

    1 2 34 5 6 78 9 10 11 12 13 14 15 1

  • Page 118 and 119:

    1 2 3 4 5 6 7 8 9 10 2.07 1.91 1.88

  • Page 120 and 121:

    1 2 3 4 5 6 7 8 9 0 2.95 2.94 2.68

  • Page 122 and 123:

    120 TABLE 4.14 T on N N on T mean 2

  • Page 124 and 125:

    122 TABLE 4.17 iTonN NonT mean 2.53

  • Page 126 and 127:

    1 2 3 4 5678 9 0 L 1.99 1.80 1.89 1

  • Page 128 and 129:

    126 TABLE 4.23 AMM WRNT SRTN SRNT i

  • Page 130 and 131:

    128 TABLE 4.25 Site Lane (sec) a(se

  • Page 132 and 133:

    130 TABLE 4.28 Arrivals per 15 sec

  • Page 134 and 135:

    0 12345678 9 10 11 12 13 14 ^15 0 .

  • Page 136 and 137:

    0.00 0.10 0 . 20 0 . 30 0.40 0.50 0

  • Page 138 and 139:

    0. 4 N g N 0 5.0 10.0 io . 04 I- -J

  • Page 140 and 141:

    -C 0) - 10 o C U C U U U -c U> '4-.

  • Page 142 and 143:

    0 (0 4.0 3. 5 3. 0 II 0 (U c 2.5 -J

  • Page 144 and 145:

    I.-) U1 (0 4.0 31,5 3. 0 2.5 I' cL

  • Page 146 and 147:

    1. 0. 0. 0:0. .a •0. .0 0 0. 140

  • Page 148 and 149:

    5.1 Introduction 146 Computer simul

  • Page 150 and 151:

    R0 = 5, N = 16, then 148 = 5 * 5 mo

  • Page 152 and 153:

    150 9 approach road resulting in a

  • Page 154 and 155:

    1 j-J'. 1. The entering vehicles ca

  • Page 156 and 157:

    154 real time would take 10 to 40 s

  • Page 158 and 159:

    156 and at what simulated time deta

  • Page 160 and 161:

    starJ jnitidl Va] uesl cjereration

  • Page 162 and 163:

    6.1 Introduction 160 The simulation

  • Page 164 and 165:

    162 and gap-acceptance parameters.

  • Page 166 and 167:

    164 on the above range is shown on

  • Page 168 and 169:

    166 500, 1000, 2000, 3000 veh/hr Q

  • Page 170 and 171:

    168 were assumed constant. Therefor

  • Page 172 and 173:

    170 and around capacity. Ashworth &

  • Page 174 and 175:

    0 4J U) cc N C) O C' N .ON Lrc cc-c

  • Page 176 and 177:

    C.. N -c > >. 4., 0 (0 L) 4., (0 -J

  • Page 178 and 179:

    4, 0 3.5 o 3.0 C -J 4- 0 I -a E 0 >

  • Page 180 and 181:

    C -J '4- 7 o C- -Q z > 4. 0 3. 5 4.

  • Page 182 and 183:

    (. -c N -c0> 500 480 460 440 420 40

  • Page 184 and 185:

    0 -J IL 1050 1000 950 900 850 800 1

  • Page 186 and 187:

    C- -c N-c 11 > 0 360 340 320 300 28

  • Page 188 and 189:

    C) I, >.' a C, (0 I 0) > (0 2 1 0 I

  • Page 190 and 191:

    0 I. >' -J a 0) C- > -J 60 50 40 30

  • Page 192 and 193:

    0 (tj >.' (U -J a 0') (U C- > -J CU

  • Page 194 and 195:

    0 I. > C C.. > -J 0 50 40 30 20 192

  • Page 196 and 197:

    \ -J 0 I > -J 2 1 0 - 0 194 Qi = 50

  • Page 198 and 199:

    0 Q) > 0 0 80 70 60 50 40 30 L 10 I

  • Page 200 and 201:

    0 a, a, II >\ -J a, a, 0) C. a, > -

  • Page 202 and 203:

    0 90 ao 70 60 50 40 30 >.' -J 20 10

  • Page 204 and 205:

    60 40 20 202 02 a 200 ec 500 = 1.50

  • Page 206 and 207:

    0 (0 60 40 204 Q2 ci = 300 sec , 50

  • Page 208 and 209:

    0 (0 60 40 206 Bet a Q1 = 500 veh/h

  • Page 210 and 211:

    0 60 40 01 = 2000 veh/hr 02 = 1000

  • Page 212 and 213:

    0 60 40 11 210 Alpha 01 = 500 veh/h

  • Page 214 and 215:

    0 60 40 11 212 ALpha Q1 = 2000 veh/

  • Page 216 and 217:

    214 CHAPTER 7 CONCLUSIONS

  • Page 218 and 219:

    216 operation below and around capa

  • Page 220 and 221:

    218 REFERENCES Adams, W. F., 1936.

  • Page 222 and 223:

    220 Department of the Environment,

  • Page 224 and 225:

    222 Pearson, R.H. and M.G. Ferreri,

  • Page 226 and 227:

    224 APPENDIX 1 THE OBSERVED DATA CO

  • Page 228 and 229:

    c 7 4 226 0 4 24 Gp ;::e, c Fourc A

  • Page 230 and 231:

    228 APPENDIX 2 THE COMPUTER SIMULAT

  • Page 232 and 233:

    230 APPEM)IX 2b Computer Simulation

  • Page 234 and 235:

    530 44 542 46 540 42 41 40 45 4? 23

  • Page 236 and 237:

    154 IF (R1(N0,41-1).EO.2) OCT13 154

  • Page 238 and 239:

    236 580 IF (KCH.EO.li WRITE(6,580)

  • Page 240 and 241:

    91 110 IF (l1-IO.0T.0) 6010 110 111

  • Page 242 and 243:

    19t2 LNUI2,113) 240 N2 Pf2 107 N2=N

  • Page 244 and 245:

    242 APPENDIX 3 DIFFERENCE IN DELAY

  • Page 246 and 247:

    0) 0 0) 244 0 ci) 0 -I '-I ' (') cc

  • Page 248:

    a) 0 246 a) a) CD Lfl Q -I (V) o' r

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