Iowa State University Capstones, Theses and Retrospective Theses and Dissertations Dissertations 1-1-2002 Temporary speed hump impact evaluation Daniel James Smith Iowa State University Follow this and additional works at: https://lib.dr.iastate.edu/rtd Recommended Citation Smith, Daniel James, "Temporary speed hump impact evaluation" (2002). Retrospective Theses and Dissertations. 21323. https://lib.dr.iastate.edu/rtd/21323 This Thesis is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. Temporary speed hump impact evaluation by Daniel James Smith A thesis submitted to the graduate faculty in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Major: Civil Engineering (Transportation Engineering) Program of Study Committee: Dr. Keith Knapp, Co-major Professor Dr. Shauna Hallmark, Co-major Professor Dr. Gary Thomas Dr. William Meeker Iowa State University Ames, Iowa 2002 11 Graduate College Iowa State University This is to certify that the master's thesis of Daniel James Smith has met the thesis requirements oflowa State University Signatures have been redacted for privacy lll TABLE OF CONTENTS TABLE OF CONTENTS ...................................................................................................................... iii LIST OF FIGURES ............................................................................................................................. vii LIST OF TABLES .................................................................................................................................. x CHAPTER 1. INTRODUCTION .......................................................................................................... 1 Background ......................................................................................................................................... 1 History of Traffic Calming ............................................................................................................. 1 Traffic Calming Devices ................................................................................................................. 2 Volume Control Devices ............................................................................................................ 3 Speed Control Devices ................................................................................................................ 3 Problem Statement .............................................................................................................................. 5 Objectives ........................................................................................................................................... 6 Thesis Organization ............................................................................................................................ 7 CHAPTER 2. LITERATURE REVIEW ............................................................................................... 8 Introduction ......................................................................................................................................... 8 Speed Hump/Table Design .................................................................................................................. 8 Construction Materials and Practices .............................................................................................. 8 Placement and Spacing ................................................................................................................... 9 Geometric Design ......................................................................................................................... 12 Signing and Marking .................................................................................................................... 13 Speed Hump/Table Impacts .............................................................................................................. 19 Speed Reduction ........................................................................................................................... 20 Volume Reduction ........................................................................................................................ 25 Speed Hump/Table Public Opinion .................................................................................................. 27 Summary ........................................................................................................................................... 28 CHAPTER 3. SITE SELECTION AND DATA COLLECTION METHODOLOGY ....................... 30 Introduction ....................................................................................................................................... 30 Site Selection .................................................................................................................................... 30 Site Descriptions ........................................................................................................................... 31 Roosevelt Drive-Atlantic, Iowa ................................................................................................ 32 Redwood Drive-Atlantic, Iowa ................................................................................................. 33 lV Canal Shore Drive-Le Claire, Iowa .......................................................................................... 35 Speed Hump/Table Installations ....................................................................................................... 36 Installation Process ....................................................................................................................... 38 Speed Hump/Table Site Locations ............................................................................................... 38 Signing and Markings ................................................................................................................... 41 Data Collection Methodology ........................................................................................................... 43 Speed Data Collection .................................................................................................................. 43 Volume Data Collection ............................................................................................................... 46 Errors Introduced .......................................................................................................................... 46 Resident Survey ............................................................................................................................ 53 CHAPTER 4. DATA ANALYSIS AND RESULTS .......................................................................... 54 Introduction ....................................................................................................................................... 54 Data Preparation ............................................................................................................................... 54 Speed Profile Creation .................................................................................................................. 54 Calculation of Average Speed ...................................................................................................... 55 Visual Comparison of Speed Profiles Before, Dunng, and After Placement of Temporary Speed Hump and Speed Table ..................................................................................................................... 55 Comparison of Mean Speeds Before, During, and After Placement of the Temporary Speed Hump and Speed Table ................................................................................................................................ 61 Speed Hump Impacts .................................................................................................................... 62 Speed Table Impacts ..................................................................................................................... 64 Speed Hump and Speed Table Comparison .................................................................................. 64 Comparison of Excessive Speeds Before, During, and After the Placement of Temporary Speed Hump and Speed Table ..................................................................................................................... 68 Changes in Peak Vehicle Speeds .................................................................................................. 68 Changes in 85th Percentile Speed .................................................................................................. 71 Comparison of Decelerations/Accelerations Before, During, and After Placement of Temporary Speed Hump and Speed Table .......................................................................................................... 73 Temporary Speed Hump/Table Spacing ........................................................................................... 78 Volume Evaluation ........................................................................................................................... 80 CHAPTER