Westminster Bridge Road VMAP Stage 5 Submission 4 - … · Job number: 5099203.805 Document ref: VMAP Stage 5 Submission Revision Purpose Description Originated Checked Reviewed Authorised

Westminster Bridge Road VMAP Stage 5 Submission London Borough of Lambeth

4 November 2016

Westminster Bridge Road VMAP Stage 5 Submission

Atkins VMAP Stage 5 Submission | Version 1.0 | 4 May 2016 | 5099203.805

Notice

This document and its contents have been prepared and are intended solely for London Borough of Lambeth’s and Transport for London’s information and use in relation to base VISSIM model calibration for the Westminster Bridge Road scheme.

Atkins assumes no responsibility to any other party in respect of or arising out of or in connection with this document and/or its contents.

This document has 21 pages including the cover.

Document History

Job number: 5099203.805 Document ref: VMAP Stage 5 Submission

Revision Purpose Description Originated Checked Reviewed Authorised Date

Rev 1.0 VMAP Stage 5 Report PB XL TE GW 04/11/16

Client signoff

Client London Borough of Lambeth

Project Westminster Bridge Road

Document title VMAP Stage 5 Submission

Job No. 5099203.805

Copy No.

Document reference


Atkins VMAP Stage 5 Submission | Version 1.0 | 4 May 2016 | 5099203.805

Table of contents

Chapter Pages

1. Introduction 4 1.1. Background 4 1.2. Report Structure 4

2. Proposed VISSIM Models 5 2.1. Model Network 5 2.2. Proposals (V503) 6 2.3. Proposed Model Assumptions (V503) 7 2.4. Proposed Model Results 7

3. Summary and Conclusion 13

Appendices 14

Future BaseTraffic Flow Diagrams 15

Proposed Traffic Flow Diagrams 18

Figures Figure 2-1 Extent of study area (outlined in red) ......................................................................................... 6 Figure 2-2 Travel time sections ................................................................................................................... 9


Atkins VMAP Stage 5 Submission | Version 1.0 | 4 May 2016 | 5099203.805 4

1. Introduction

1.1. Background Atkins was commissioned by the London Borough of Lambeth to carry out VISSIM modelling for improvement schemes surrounding several junctions on Westminster Bridge Road near Lower Marsh and Kennington Road. The VISSIM model has been extended to include Kennington Road and Lambeth Road as instructed by TfL.

The study area is situated in the London Borough of Lambeth and carries significant volumes of traffic, including buses and HGVs. The purpose of this study is to produce proposed VISSIM models for the following signalised junctions:

Westminster Bridge Road (A302) / Kennington Road (A23) / Baylis Road (B300) / Hercules Road o UTC Region 168 o Comprises:

09/071 – Stream 0 09/372 – Stream 1

Lambeth Road (A3203) / Kennington Road (A23) o UTC Region 277 o Comprises:

09/037

Lambeth Road (A3203) / Hercules Road o UTC Region 277 o Comprises:

09/239

This report covers the proposed traffic modelling process, a description of the proposed scheme, details of the modifications in the models, and an evaluation of the results for the AM and PM peak hours. This process involved the modification of the validated base models to include new designs for the above junctions and changes to the existing road network, as well as the inclusion of future demands (Committed and Development Flows). All VISSIM modelling was completed using VISSIM 5.40.

The report will be submitted to TfL together will all relevant VISSIM modelling as part of the VISSIM Model Auditing Process (VMAP) Stage 5.

1.2. Report Structure The structure of report is as follows:

Section 2: Proposed VISSIM Models;

Section 3: Summary and Conclusions;



2. Proposed VISSIM Models

Proposed VISSIM models were developed in accordance with TfL’s guidance set out in the Transport for London Modelling Guidelines, Version 3. The models were developed in alignment with the principles of the TfL Model Audit Process (MAP), any deviation from this process has been agreed with TfL.

The proposal required modifications at the junction between Westminster Bridge Road and Kennington Road, with a new diagonal crossing and improved cycle facilities as part of the integrated improvements. Base validated models have been used to provide the model basis. Any changes to the base model are explained within this report.

2.1. Model Network The extent of the VISSIM model is shown in Figure 2-1 and includes:

The junction of Westminster Bridge Road (A302) with Kennington Rad (A23), Baylis Road (B300), and Hercules Road;

Kennington Road (A23) between Lambeth Road (A3203) in the south and Westminster Bridge Road (A302) in the north;

Lambeth Road (A3203) between Hercules Road in the west and Kennington Road (A23) in the east;

Hercules road between Lambeth Road (A3203) in the southwest and Westminster Bridge Road (A302) in the northeast; and

Cosser Street between Hercules Road in the west and Kennington Road (A23) in the east.



Figure 2-1 Extent of study area (outlined in red)

The network includes the following traffic signal junctions, puffins, and pelicans:

J09/037 Kennington Road (A23) / Lambeth Road (A3203)

J09/071 Westminster Bridge Road (A302) / Kennington Road (A23) / Baylis Road (B300) / Hercules Road

J09/239 Lambeth Road (A3203) / Hercules Road

P09/372 Westminster Bridge Road (A302) / Kennington Road (A23) / Baylis Road (B300) / Hercules Road

2.2. Proposals (V503) The proposal will include a number of changes to the base validated model, all of which are to the Junction at Westminster Bridge Road / Kennington Road / Baylis Road:

A new diagonal crossing at Westminster Bridge Road / Kennington Road / Baylis Road between Lambeth North Underground Station and the wouth west footway;

The left turn from Westminster Bridge Road WB is banned, and the traffic island at this location removed;

The left hand turn from Baylis Road to Westminster Bridge Road is banned;

Hercules Road at the approach to Kennington Road is realigned, and becomes a priority junction;

Realignment of the existing controlled crossing facilities;

Extension of the ASLs on Kennington Road and Baylis Road arms to 7.5m;

Four second head starts for cyclists on Kennington Road and Baylis Road; and

A new 5m ASL on Wesminster Bridge Road WB approach.



Northbound Quietway with a stepped cycle track leading into the Kennington Road Advanced Stop Lane; and

Southbound Quietway with a stepped cycle lane leading to a side by side controlled crossing on Kennington Road to access Hercules Road.

2.3. Proposed Model Assumptions (V503) The following assumptions were made when constructing the proposed traffic modelling scenarios:

The proposals’ modelling is based on VMAP Stage 2 and 3 models for the AM peak model (08:15 – 09:15) and the PM peak (18:00 – 19:00);

Junctions J09/071 and P09/372 are affected by the proposals;

The VISSIM base models have been modified according to the schemes that have been described in Sections 2.1 and Error! Reference source not found.2;

Flows for the Future Base and Proposed models have been informed by results of individual ONE model runs, it should be noted that the base model flows were based on on-site observations;

The Proposed model journey time results are compared to the Base and Future Base results;

Proposed signal data, including intergreen times, stage timings, and phase delays for all junctions within the model (09/071, 09/037, 09/239 and 09/372) are based on the LinSig models. The signal timings have been tweaked slightly in Vissim to further optimise journey times.

The ‘.PUA’ and ‘.VAP’ files relating to model have been modified according to the LinSigs;

The lane widths of lane 3 on Kennington Road NB, and lane 2 on Wesminster Bridge Road WB have been increased to incorporate a proposed cycle lane at these locations.

2.4. Proposed Model Results The results from the proposed and future base models have been obtained from a set of 10 simulations, the seed values used were between 17 and 107 (with an increment of 10 between each run).

2.4.1. Traffic Flows (V504) Detail of the traffic flows for the Future Base and Proposed models can be found in Appendix A and Appendix B, respectively. Tables 2-1 and 2-2 below show the traffic flows for the AM and PM peaks respectively. Base, Future Base and proposed flows are included in the results tables.



Table 2-1 AM Peak Model Flows

Junction

Mo

vem

en

t

Base

Fu

ture

Bas

e

Pro

po

sed

Lambeth Rd/ Kennington Rd S-E 204 96 100

Lambeth Rd/ Kennington Rd S-N 375 278 240

Lambeth Rd/ Kennington Rd S-W 31 53 61

Lambeth Rd/ Kennington Rd E-S 76 26 63

Lambeth Rd/ Kennington Rd E-N 11 0 0

Lambeth Rd/ Kennington Rd E-W 290 156 256

Lambeth Rd/ Kennington Rd W-S 50 30 40

Lambeth Rd/ Kennington Rd N-S 160 102 100

Lambeth Rd/ Kennington Rd N-E 16 14 0

Lambeth Rd/ Kennington Rd W-E 316 232 348

Lambeth Rd/ Kennington Rd W-N 23 32 202

Lambeth Rd/ Kennington Rd N-W 29 96 79

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd W-E 220 245 249

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd W-N 24 0 0

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd W-S 25 30 24

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd W-SW 4 0 0

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd N-E 11 10 0

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd N-S 130 165 156

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd N-SW 79 0 0

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd E-W 396 193 307

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd E-S 50 14 0

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd SW-W 16 61 13

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd S-W 164 98 118

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd SW-N 47 91 20

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd S-N 246 163 321

Lambeth Rd/ Hercules Rd W-E 389 293 472

Lambeth Rd/ Hercules Rd W-N 71 207 10

Lambeth Rd/ Hercules Rd E-W 351 305 387

Lambeth Rd/ Hercules Rd N-W 82 0 9



Table 2-2 PM Peak Model Flows

Junction

Mo

vem

en

t

Base

Fu

ture

Bas

e

Pro

po

sed

Lambeth Rd/ Kennington Rd S-E 92 55 73

Lambeth Rd/ Kennington Rd S-N 391 159 184

Lambeth Rd/ Kennington Rd S-W 46 32 33

Lambeth Rd/ Kennington Rd E-S 91 60 83

Lambeth Rd/ Kennington Rd E-N 25 0 0

Lambeth Rd/ Kennington Rd E-W 337 233 225

Lambeth Rd/ Kennington Rd W-S 61 67 84

Lambeth Rd/ Kennington Rd N-S 284 316 288

Lambeth Rd/ Kennington Rd N-E 18 11 0

Lambeth Rd/ Kennington Rd W-E 482 264 271

Lambeth Rd/ Kennington Rd W-N 36 12 117

Lambeth Rd/ Kennington Rd N-W 40 89 61

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd W-E 285 335 342

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd W-N 34 3 2

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd W-S 82 0 32

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd W-SW 3 0 0

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd N-E 10 3 0

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd N-S 209 336 319

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd N-SW 84 6 0

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd E-W 334 99 112

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd E-S 48 79 0

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd SW-W 16 26 1

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd S-W 139 27 52

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd SW-N 112 58 6

Westminster Bridge Rd/ Kennington Rd/ Baylis Rd S-N 304 126 254

Lambeth Rd/ Hercules Rd W-E 578 348 462

Lambeth Rd/ Hercules Rd W-N 132 114 11

Lambeth Rd/ Hercules Rd E-W 423 352 310

Lambeth Rd/ Hercules Rd N-W 88 6 11

2.4.2. Saturation Flows, Queue Lengths, and Journey Times (V505) Travel time sections are shown in Figure 2-2 below.

Figure 2-2 Travel time sections



In the VISSIM base model, the surveyed travel times were compared to the modelled data for both the AM and PM peak periods. In the proposed model the modelled travel times have been compared to the modelled future base, and the base for the AM and PM peak period.

Table 2-3 AM Peak Journey Time Comparison - General Traffic

General traffic journey times results for the AM peak period in the proposed model indicate an increased journey time when compared to the future base scenario for all routes. The maximum increase in journey time is 13.9 seconds on route 1 southbound. The closure of Hercules as a through route results in an increased volume of traffic along routes 1 and 2, resulting in increased journey times.

When compared to the base journey times, the proposed model also indicates a small increase in journey time on all sections.

Route Base (s) Futurebase (s) Proposed (s) Difference (between future

base and proposed) (s)

Difference (between base and proposed)

(s)

1 NB 55.6 52.2 62.4 10.2 6.8

1 SB 49.2 54.0 67.9 13.9 18.7

2 EB 58.9 66.3 77.0 3.7 18.1

2 WB 34.4 26.8 39.3 13.5 4.9

3 NB 70.0 188.9 n/a - -

3 SB 85.5 n/a n/a - -



Table 2-4 AM Peak Journey Time Comparison - Buses

Bus journey time results for the AM peak period in the proposed model indicate an increase on route 1 southbound (10.8s) and route 2 eastbound (14.9s), but a decrease on routes 1 northbound (-9.4s), and route 2 westbound (-7.9s). Taking into account all journey time sections, overall there is only a very slight negative impact on bus journey times.

When compared to the base journey times, the proposed results indicate a significant improvement on route 1 northbound (-14.7s) and route 2 westbound (-7.0s), and a slight increase in journey times on route 1 southbound (3.3s) and route 2 eastbound (1.6s).

Table 2-5 PM Peak Journey Time Comparison - General Traffic

General traffic journey time results for the PM peak period in the proposed model indicate slightly decreased journey times on routes 1 northbound (-2.8s), route 2 eastbound remains the same, while route 1 southbound (5.5s) and route 2 westbound (8.0s) see an increase in journey times.

When compared to base journey times, the proposal results show increased journey times on route 2, both eastbound (25.7s) and westbound (8.8s), and redcued journey times on route 1, both northbound (-4.6s) and southbound (-12.3s).

Table 2-6 PM Peak Journey Time Comparison - Buses

Route Base (s) Future base (s) Proposed (s) Difference (between future



(s)

1 NB 75.2 69.9 60.5 -9.4 -14.7

1 SB 85.2 77.7 88.5 10.8 3.3

2 EB 91.5 78.2 93.1 14.9 1.6

2 WB 105.0 105.9 98.0 -7.9 -7.0




(s)

1 NB 51.0 49.2 46.4 -2.8 -4.6

1 SB 62.6 44.8 50.3 5.5 -12.3

2 EB 63.2 88.3 88.9 0.6 25.7

2 WB 31.2 32.0 40.0 8.0 8.8

3 NB 68.0 62.6 n/a - -

3 SB 84.8 87.5 n/a - -




(s)

1 NB 56.0 55.2 51.0 -4.2 -5.0

1 SB 97.3 78.6 85.5 6.9 -11.8



Bus journey time results for the PM peak in the proposed model show a decrease on routes 1 northbound (-4.2s) and 2 eastbound (-6.3s) when compared to future base. There is an increase in journey times for routes 1 southbound (6.9s) and 2 westbound (8.7s).

When compared to the base journey times, the proposal results show a decrease on route 1, both northbound (-5.0s) and southbound (-11.8s), and on route 1 eastbound (-10.9s). There is an increase in journey time on route 2 eastbound (9.9s).

2 EB 86.3 81.7 75.4 -6.3 -10.9

2 WB 76.2 77.4 86.1 8.7 9.9



3. Summary and Conclusion

Calibrated and validated VISSIM base models (for the VMAP stage 5) were developed for the study area for the AM (08:15 to 09:15 hours) and PM (18:00 to 19:00 hours) peak hours.

As agreed with TfL, the model is required to be audited through TfL’s Model Auditing Process (MAP). The VISSIM model files have been supplied along with this report to allow that review.

Traffic flow analysis and journey time analysis have been undertaken for the models. Traffic flow analysis shows that the improvements at Westminster Bridge Road / Kenninton Road / Baylis Road and closure of Hercules Road to through traffic, have a very minimal negative impact on journey times for general traffic and buses. There is a general slight increase in journey time across all routes in the AM peak for both general traffic, but bus journey times have improved on certain routes while slightly worsened on others. The journey time results in the PM peak generally show that an increased journey time in one direction of travel has been accompanied by a journey time improvement in the other direction of travel, for both general traffic and buses. The changes in journey times in the most part are under 10 seconds.

Appendices



Future BaseTraffic Flow Diagrams

AM General Traffic (excluding Taxi)

AM Taxi

6

194

164

6

168

6284

Westminster Bridge Road (A203)


Kennington Road (A203)

Hercules Road

Baylis Road (B300)

0

Lambeth Road (A3203)




22146

93

0167

26

72

1004

8

26031

2850

299

146

0 0

285

229

142

86

229176

176

299

229

0

170

299

285

27

75

31

4

52

897




Hercules Road

Baylis Road (B300)

3





8014

9

018

5

36

1812

27

63

680

36

82

0 0

68

107

76

87

10766

66

36

107

0

58

36

68



AM Cyclist

PM General Traffic (excluding Taxi)

8

8

28

2

131

2

679

83




Hercules Road

Baylis Road (B300)

3





79641

62

178

2

1

361

7

1041

1200

112

85

12 0

120

804

0 12

2

125

80438

38

112

0

297

332

2

95

38183




Hercules Road

Baylis Road (B300)

4





14011

43

0214

59

54

3027

3

25366

2790

322

73

6 0

279

143

68

28

143363

363

322

143

7

325

322

279



PM Taxi

PM Cyclist

0

75

37

1

11

4646




Hercules Road

Baylis Road (B300)

10





2022

13

019

10

42

356

9

304

830

43

45

0 0

83

29

42

25

2983

83

43

29

0

37

43

83

89

84

389

1

23

0

57

13




Hercules Road

Baylis Road (B300)

5





702

4

063

44

2

4760

7

6134

670

102

0

69 0

67

77

3 66

0

20

77478

478

102



Proposed Traffic Flow Diagrams

AM General Traffic (excluding Taxi)

AM Taxi

5

215

163

0

310

0308




Hercules Road

Baylis Road (B300)

0





24663

105

0245

46

65

980

149

26935

3703

445

4

5 8

373

395

5

92

395165

163

453

395

3

165

453

373

2

19

77

21

0

60

088




Hercules Road

Baylis Road (B300)

3





4724

11

017

9

17

160

77

1110

544

89

6

4 9

58

124

27

63

12437

33

98

124

3

37

98

58

4



AM Cyclist

PM General Traffic (excluding Taxi)

8

8

28

2

131

2

679

83




Hercules Road

Baylis Road (B300)

3





79641

62

178

2

1

361

7

1041

1200

112

85

12 0

120

804

0 12

2

125

80438

38

112

31

293

324

0

108

0189




Hercules Road

Baylis Road (B300)

4





14020

53

0222

73

50

3000

73

26584

2902

415

6

4 7

292

213

3

27

213352

350

422

213

3

352

422

292

2



PM Taxi

PM Cyclist

6

80

22

0

12

041




Hercules Road

Baylis Road (B300)

10





1642

22

015

11

10

180

43

257

616

70

3

7 5

67

59

4

22

5928

28

75

59

0

28

75

83

89

84

389

1

23

0

57

13




Hercules Road

Baylis Road (B300)

5





702

4

063

44

2

4760

7

6134

670

102

0

69 0

67

77

3 66

0

20

77478

478

102

© Atkins Ltd except where stated otherwise. The Atkins logo, ‘Carbon Critical Design’ and the strapline ‘Plan Design Enable’ are trademarks of Atkins Ltd.

Tom Emmitt Atkins Euston Tower 286 Euston Road London NW1 3AT

[email protected]

Documents

Westminster Bridge Road VMAP Stage 5 Submission 4 - … · Job number: 5099203.805 Document ref: VMAP Stage 5 Submission Revision Purpose Description Originated Checked Reviewed Authorised