Further Studies of Roundabouts:

Hutchinson, Kansas Study

 

Sudhakar Sathyanarayanan, Graduate Student,

Civil Engineering

Eugene R. Russell, Professor, Civil Engineering

Margaret J. Rys, Associate Professor, Industrial and Manufacturing Systems Engineering

Kansas State University

 


Table of Contents

List of figures. 8

List of Tables. 10

Acknowledgements. 11

Dedication.. 12

1 Introduction.. 13

1.1 General. 13

1.2 Study objective. 17

1.3 Organization of the report. 18

1.4 Units of measure. 19

2 Literature Review... 20

2.1 General. 20

2.2 Intersection design characteristics. 20

2.3 Types of intersection controls. 23

2.4 Modern roundabouts. 27

2.4.1 Characteristics of modern roundabouts. 28

2.4.2 Appropriate and inappropriate sites for modern roundabouts. 33

2.5 Two-way stop control (TWSC) 35

2.6 All-way stop control (AWSC) 36

2.7 Traffic signal control (TSC) 37

2.7.1 Types of Traffic Signal controller. 38

2.8 Intersection with wider medians. 41

2.9 Measures of effectiveness (MOE) 42

2.10 Computer software – Analysis tools. 44

2.10.1 SIDRA.. 46

2.10.2 TRANSYT - 7F.. 51

2.11 Safety.. 52

2.12 Public opinion about modern roundabouts. 57

2.13 Summary.. 59