SIDRA – BASED ASSESSMENT FOR EFFECTIVENESS OF

ROUNDABOUT OPERATIONS

A Mini Project submitted in partial fulfillment of the

requirements for the award of the degree of

MASTER OF
ENGINEERING IN
CIVIL ENGINEERING

With specialization in Transportation Engineering

by

SALMA SUBHANI
Roll No: 1603-21-741-
401

Under the Supervision of

Mrs. Taheseen Sultana

Associate Professor, Department of Civil Engineering

DEPARTMENT OF CIVIL ENGINEERING

DECCAN COLLEGE OF ENGINEERING AND TECHNOLOGY
(Affiliated to Osmania University)
Darussalam, Hyderabad, Telangana –
500001

i
 2023

ii
 DEPARTMENT OF CIVIL ENGINEERING
UNIVERSITY COLLEGE OF ENGINEERING OSMANIA
UNIVERSITY, HYDERABAD-500007

TELANGANA STATE, INDIA

M.E Dissertation Evaluation Sheet

Name of the Candidate : SALMA SUBHANI

Roll No. : 1603-21-741-401

Specialization : Transportation Engineering

Date of External Viva-Voce : ……………………………………………

Grade : ……………………………………………

Signature of Chair Person,

Board of Studies, Civil Engineering, O.U. : ……………………………………………

Signature of External Examiner : ……………………………………………

Signature of Supervisor : ……………………………………………

Signature of the Head, CED, DCET : ……………………………………………

iii
 DEPARTMENT OF CIVIL ENGINEERING
DECCAN COLLEGE OF ENGINEERING AND TECHNOLOGY
(Affiliated to Osmania University)
Darussalam, Hyderabad, Telangana –

500001

CERTIFICATE
This is to certify that the dissertation entitled “SIDRA- Based Assessment for
Effectiveness of Roundabout Operation” submitted by Salma Subhani bearing
Roll No. 160321741401 in partial fulfilment of the requirement for the award of
Degree of Master of Engineering in Civil Engineering with specialization in
Transportation Engineering to Osmania University, Hyderabad, Telangana State, is a
record of bonafide work carried out by him during the academic year 2022-2023
under my supervision and that this work is not submitted elsewhere for the award of
any other degree.

Mrs. Taheseen Dr. M.A Wajid Siddiqui, M.E, Ph.D.,

Sultana, Assistant Assistant Professor & Head
Professor Department of Civil Engineering
Department of Civil Engineering Deccan College of Engineering and
Deccan College of Engineering Technology
and Technology Dar-us-salaam, Hyderabad,500001
Dar-us-salaam, Hyderabad, 500001
iv
 DECLARATION

I do hereby declare that the work reported in this dissertation titled “SIDRA- Based
Assessment for Effectiveness of Roundabout Operation” has been independently
carried out under the guidance of Mrs. Taheseen Sultana, Dept. of Civil Engineering,
Deccan College of Engineering and Technology. Except where specific reference is
made to the works of others, the contents of this dissertation are original and have
never been submitted, in part or as a whole, to any other university for any degree.
The dissertation is based on the work done entirely by me and not copied from any
other source.

This work has been submitted in partial fulfilment of the requirement for the award of
Master of Engineering in Transportation Engineering to Osmania University during
the academic year 2022-2023.

Place: Hyderabad SALMA

SUBHANI Date: (160321741401)

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 DEPARTMENT OF CIVIL ENGINEERING
DECCAN COLLEGE OF ENGINEERING AND TECHNOLOGY
(Affiliated to Osmania University)
Darussalam, Hyderabad, Telangana – 500001

PLAGIARISM CERTIFICATE

This is to certify that the thesis entitled ‘SIDRA – BASED ASSESSMENT FOR
EFFECTIVENESS OF ROUNDABOUT OPERATIONS’ submitted by Salma
Subhani, towards partial fulfillment of the requirements for the award of the Master
of Engineering/Technology degree in Civil Engineering with specialization in
Transportation Engineering was analyzed for Plagiarism. The Similarity Index was
found to be 21% which is less than 30% as per Osmania University Faculty of
Engineering norms.

Signature of Student Signature of the Head,CED,DCET

Signature of the Supervisor Signature of the Chairperson,Bos,OU

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 ACKNOWLEDGEMENT
I would like to express my sincere thanks to my beloved guide Mrs. Taheseen
Sultana, Assistant Professor of Civil Engineering, Deccan College of Engineering
and Technology for his timely and valuable suggestions. I am thankful for her
guidance and active supervision at every stage of the dissertation work. She has been
constant driving force, source of inspiration and encouraging me throughout this
work. It is her immense patience and co-operation that has helped for the successful
completion of this work.

I express my sincere thanks to Prof. M.V.S. Sreedhar, Chairperson, Board of

Studies, Civil Engineering Department, Osmania University, for his valuable support
and advice for preparation of this report as per the format and facilitating viva-voce.

I express my sincere thanks to Prof. P. Rajasekhar, Professor and Head of Civil

Engineering, Osmania University, for facilitating the conduct of viva-voce
examination.

I am thankful to, Principal Prof. Sriram Venkatesh, University College of

Engineering, Osmania University, Hyderabad for facilitating the conduct of viva-voce
examination

.I am thankful to Dr. Mir Iqbal Faheem, Director of Deccan Group of Institutions

for providing facilities to carry out the dissertation work.

I am thankful to Prof. Syeda Gauhar Fatima, Principal of Deccan College of

Engineering and Technology for providing facilities to carry out the dissertation work.

I’m very much thankful to Dr. M. A. Wajid Siddiqui, Head of Dept. of Civil
Engineering, Deccan College of Engineering and Technology and management for
providing facilities to carry out the dissertation work

I’m thankful to Dr. Minhajuddin Aquil, Associate Professor, Dept of Civil

Engineering, DCET and Mrs. Huda Noorien, Assistant professor, Dept of Civil
Engineering, DCET with whom I was associated during my course of study for their
kind cooperation.

SALMA

SUBHANI
vii
 (160321741401

vii
i
 ABSTRACT

A thorough investigation of a roundabout's performance is necessary for design and

planning. The key indicators of a roundabout's success are its entry capacity, LOS,
delay, speed efficiency, and degree of saturation. Since two- and three-wheeled
vehicles make up the majority of the traffic in developing nations like India, it is
diverse. Hyderabad is likewise one of Telangana's emerging cities. Hyderabad
features a fair number of roundabouts as well. The purpose of this study is to evaluate
the network of roundabouts in Hyderabad, including Shri Agrasen Chowk and the PV
Narsimha Rao Roundabout, based on capacity and control delay, and to make any
necessary changes.

Three phases make up this study's execution: first, the collection of geometric data,
critical gap and follow-up headway gaps in the traffic stream, and traffic volume
count data were obtained from government agencies for roundabouts; second, the
performance assessment of individual sites and network analysis of roundabouts were
completed using Sidra software, which was calibrated using natural field conditions.
The analysis of individual sites and the network following the change in lane
geometry by implementing lane disciplines are included in the study's final section
and are determined to be adequate for improving the network's LOS, DOS, and speed
efficiency. This study has showed how roundabouts are networked and evaluated in
terms of their performance, which is likely to aid traffic engineers, planners, and
policy makers in comprehending how well a particular roundabouts function in the
face of diverse traffic patterns.

Keywords: SIDRA intersection, Lane-based network analysis, Roundabouts, Raff’s

method, Analytical gap – acceptance method.

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 TABLE OF CONTENTS
TITLE Page No.

CERTIFICATE iii

DECLARATION iv

PLAGIARISM CERTIFICATE v

ACKNOWLEDGEMENT vi

ABSTRACT vii

TABLE OF CONTENTS viii

LIST OF FIGURES x

LIST OF TABLES xii

LIST OF ABBREVIATIONS xiii

Chapter 1: INTRODUCTION 1-14

1.1 General 1

1.2 Methods of Roundabout Capacity Evaluation 4

1.3 Measurement of Effectiveness (MoE) 7

1.4 Sidra Intersection 9

1.5 Need of the Study 11

1.6 Objectives of the Study 12

1.7 Scope of the Study 12

1.8 Organization of the Dissertation 13

Chapter 2: LITERATURE REVIEW 15-25

2.1 General 15

2.2 Literature Review 15

2.3 Critical Appraisal 25

Chapter 3: METHODOLOGY 26-59

3.1 General 26

3.2 Methodology 26

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 3.3 Study Area 28

3.4 Data Collection Geometric Data Collection on Intersections 29

3.5 Performance Analysis of Intersections by SIDRA 41

3.6 Lane Based Network Analysis Using Sidra 55

Chapter 4: RESULTS AND DISCUSSIONS 60-70

4.1 General 60

4.2 Results 60

4.3 Discussions 67

4.4Validation by SPSS 67

Chapter 5: CONCLUSION 70-71

5.1 General 70

5.2 Conclusions 70

5.3 Future Scope 71

References 72

Appendix

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 LIST OF FIGURES

Figure No. Description Page.

No.
1.1 Analytical Vs. Empirical Method 5

1.2 Classification of Level of Service 9

1.3 SIDRA Intersection 8 10

3.1 Methodology Flow Chart 27

3.2 Network of Study area 28

3.3 PVNR Roundabout 28

3.4 Shree Agarsen Chowk 29

3.5 Roundabout Geometry 30

3.6 The critical gap from Raff’s method of Dominant lanes 37

3.7 The critical gap Raff’s method of Sub Dominant lanes 39

3.8 Welcome display of SIDRA intersection 8 plus 44

3.9 Unsignalized roundabout site creation 45

3.10 Intersection data input 46

3.11 Movement class input 47

3.12 Origin and destination movement input 47

3.13 Lane configuration input 48

3.14 Lane discipline input 48

3.15 Lane movements input 49

3.16 Roundabout option data input 50

3.17 Roundabout data input 50

3.18 Vehicle volume input 51

3.19 Vehicle movement data input 52

3.20 Parameter setting option input data 52

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3.21 Model parameter data input 53

3.22 Analysing the input data of Roundabout-1 54

3.23 Analysing the input data of Roundabout -2 54

3.24 Analysing the input data of Roundabouts 56

3.25 Network layout after improvement and conversion 57

3.26 Analysing the network of roundabouts after improvement 57

3.27 Route-1 58

3.28 Route-2 58

3.29 Route-3 59

3.30 Route-4 59

4.1 Network LOS before 65

4.2 Network LOS after 65

4.3 Network DoS before 66

4.4 Network DoS after 66

4.5 Network speed efficiency before 67

4.6 Network speed efficiency after 67

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 LIST OF TABLES
Table No. Table Name Page
No.

1.1 Level of Service 8

3.1 Geometric characteristics of PV Narsimha Rao Roundabout 30

3.2 Geometric characteristics of Shri Agrasen Chowk 31

Roundabout
3.3 Details of Traffic Volume at PV Roundabout 33

3.4 Details of Traffic Volume at Shri Agrasen Chowk 34

Roundabout
3.5 Accepted gaps from field measurement of Dominant lanes 36

3.6 Rejected gaps from field measurement of Dominant lanes 37

3.7 Accepted gaps from field measurement of Sub Dominant 38

lanes
3.8 Rejected gaps from field measurement of Sub Dominant 38
lanes
3.9 Critical gap and Follow up headway gap of Dominant 40

3.10 Critical gap and Follow up headway gap of Sub Dominant 40

3.11 Traffic volumes at each approach of

PV Narsimha Rao Roundabout 40

3.12 Traffic volumes at each approach of Shri Agrasen Chowk 41

3.13 Control Delay and LOS 42

3.14 Control Delay and DOS 43

4.1 Site Output Results of PVNR Roundabout 62

4.2 Site Output Results of Shri Agrasen Chowk Roundabout 62

4.3 Output Results of Network Analysis Before Improvement 63

4.4 Output Results of Network Analysis After Improvement 63

4.5 Network Comparison Before and After Improvement 64

4.6 Validation of DoS Paired Samples Test of Network 69

4.7 Validation of Speed Efficiency of Network 70

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LIST OF ABBREVIATIONS AND NOTATIONS

AWSC All-Way Stop Control

LOS Level of Service

DOS Degree of Saturation

SIDRA Signalized and Unsignalized Intersection Design and Research

Aid
NCHRP National Cooperative Highway Research Program

PHF Peak Hour Factor

RHD Right Hand Drive

TRB Transportation Research Board

TWSC Two-Way Stop Control

WSDOT Washington State Department of Transportation

MSM Mirrors Signal Manoeuvre

PCU Passenger Car Unit

MLE Maximum Likelihood Estimation

ARRB Australian Road Research Board

MOE Measure of Effectiveness

V/C Volume-to-capacity

TPR Transportation Planning Rule

PDF Probability Distribution Function

PCE Passenger Car Equivalent

LV Light Vehicle

HV Heavy Vehicle
CCG Common Control Group

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FLOWCHART OF METHODOLOGY

The following flowchart shows an outline of the methodology utilized for the study

Figure 3.1: Methodology Flowchart

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