| TxDOT Report 0-4703-P2 - Roadway Safety Design Workbook. James Bonneson and Michael Pratt. This document provides the best-available information describing the relationship between various highway geometric design components and crash frequency. This document focuses on quantitative safety relationships for specific design components known to be correlated with crash frequency. It is intended for engineers responsible for the geometric design of streets and highways. ENTIRE REPORT (pdf) PROCEDURE SPREADSHEET |
Improving Pedestrian Safety at Unsignalized Crossings. The reports are available from the TRB website:
A spreadsheet was developed to automate the calculations associated with the procedure presented in Appendix A of the TCRP/NCHRP Report 112/562 report. The spreadsheet is in beta format but available for testing.. SPREADSHEET |
TxDOT Report 0-5629-P1 - Traffic Signal Operations Handbook. James Bonneson, Srinivasa Sunkari, and Michael Pratt. This handbook provides guidelines for timing traffic control signals at intersections that operate in isolation or as part of a coordinated signal system. The guidelines are intended to describe best practices, as identified through interviews with TxDOT engineers and technicians, and to identify conditions where alternative practices are equally workable. The handbook is intended to make resource investment in signal timing maintenance cost-effective and signal operation more consistent on an area-wide basis. ENTIRE REPORT (PDF) PROCEDURE SPREADSHEET |
| TxDOT Report 0-5439-P1 - Horizontal Curve Signing Handbook. J. Bonneson, M. Pratt, J. Miles, and P. Carlson. The procedures described in this handbook are intended to improve consistency in curve signing and driver compliance with the advisory speed. The handbook describes guidelines for determining when an advisory speed is needed, criteria for identifying the appropriate advisory speed, an engineering study method for determining the advisory speed, and guidelines for selecting other curve-related traffic control devices. ENTIRE REPORT (PDF) PROCEDURE SPREADSHEET |
| TxDOT Report 0-4703-P5 - Procedure for Using Accident Modification
Factors in the Highway Design Process. James Bonneson and Karl Zimmerman. This document describes a procedure for using accident
modification factors (AMFs) in the highway design process. Application of the procedure entails the use of several AMFs, where each AMF
addresses one specific design element (such as lane width, shoulder width, curve radius, etc.). The procedure can be used to evaluate the
safety benefits associated with alternative geometric designs. |
| Manual of Traffic Detector Design. J. A. Bonneson and P.T.
McCoy. This manual is available from the ITE Bookstore WWW.ITE.ORG . The procedures described in
the manual are automated in the following spreadsheet.PROCEDURE SPREADSHEET |
| TxDOT Report 0-4538-3 - Recommended Ramp Design Procedures for
Facilities without Frontage Roads. J. A. Bonneson, K. Zimmerman, C.
Messer, and M. Wooldridge. This report describes design procedures for
interchange ramps on facilities without frontage roads. The procedures
described include models for evaluating the operational and safety benefits of
alternative ramp configurations. They also include guidelines for designing
ramps of adequate length, appropriate horizontal and vertical curvature, and
reasonable accommodation of larger vehicles. ENTIRE PRODUCT (PDF - 1.37 MB)PROCEDURE SPREADSHEET |
| TxDOT Report 0-4538-1 - Review and Evaluation of Interchange Ramp Design Considerations for Facilities Without Frontage Roads J. Bonneson, K. Zimmerman, and M. Jacobson. This report describes the findings from the first year of a two-year project. Current ramp design practices were reviewed, and the operational features of interchange ramps in non-frontage-road settings were evaluated. The findings from the evaluation of the field and simulation data indicate that a rational approach to interchange type selection and operational evaluation is feasible using the critical movement analysis approach. A spreadsheet was developed to implement the guidelines. ENTIRE PRODUCT (PDF) PROCEDURE SPREADSHEET |
| TxDOT Report 0-4196-3 - Red-Light-Running Handbook: An
Engineer’s Guide to Reducing Red-Light-Related Crashes. James
Bonneson and Karl Zimmerman. The objective of this handbook is to describe
guidelines for identifying and treating locations that have an unusually large
number of red-light violations or related crashes. Separate guidelines are
presented for the treatment of red-light problems at individual intersections
and within entire cities. The guidelines address countermeasures in both the
engineering and the enforcement categories. A spreadsheet was developed to
implement the guidelines. ENTIRE
PRODUCT (PDF) PROCEDURE
SPREADSHEET |
| NCHRP Report 457 - Evaluating Intersection Improvements: An
Engineering Study Guide. James A. Bonneson. This interactive guide
describes a process for evaluating the operational effectiveness of various
intersection improvements. It focuses on problematic unsignalized
intersections. ENTIRE PRODUCT |
| TxDOT Report 4285-2 - Intersection Video Detection
Manual. James Bonneson and Montasir Abbas. This manual assists
engineers with the planning, design, and operation of a video detection system. |
| TxDOT Report 4285-3 - Intersection Video Detection Field
Handbook. James Bonneson and Montasir Abbas. This handbook is intended
to assist engineers and technicians with the design, layout, and operation of a
video detection system. It is a condensed version of the Intersection Video
Detection Manual. |
| Bridge Size and Clearance Time of the Single-Point Urban Interchange
(SPUI). James A. Bonneson. This paper describes a procedure for
quantifying the impact of various SPUI design elements on signal phase
clearance time and right-of-way requirements. The procedure is automated in an
accompanying spreadsheet. ENTIRE
PRODUCT (PDF) PROCEDURE
SPREADSHEET |
| TxDOT Report 0-5629-1 - Development of a Traffic Signal Operations Handbook. J. Bonneson, M. Pratt, and K. Zimmerman. This document summarizes the research conducted during the development of a Traffic Signal Operations Handbook. The research conducted included a review of the literature, a survey of TxDOT engineers, and an evaluation of alterative signal controller settings and detection designs. A spreadsheet was developed to automate several tasks involved in the development of a signal timing plan. A User's Manual for the spreadsheet is included in the appendix. |
| NCHRP Project 3-79 (Objective A): Measuring the Performance of Automobile Traffic on Urban Streets. James Bonneson, Anuj Sharma, and Darcy Bullock. The objective of this research was to develop techniques to measure the performance of automobile traffic on urban streets for a range of real-time applications, such as: real-time signal control, incident management, and traveler information. Three techniques were developed for measuring queue length and delay for the through movement at a signalized intersection. One technique was developed for measuring segment running time. The algorithm associated with each technique is described and an implementation guide is provided to facilitate technique implementation. |
| NCHRP Project 3-79 (Objective B): Predicting the Performance of Automobile Traffic on Urban Streets. James Bonneson, Michael Pratt, and Mark Vandehey. The objective of this research was to revise the methodology in Chapter 15 of the Highway Capacity Manual such that it can be used to more accurately predict the performance of automobile traffic on urban streets. The proposed methodology was described in the form of recommended content for the next edition of the HCM. |
| TxDOT Report 0-4703-5 - Calibration Factors Handbook: Safety Prediction Models Calibrated with Texas Highway System Data. James Bonneson and Michael Pratt. This document summarizes the research conducted and the conclusions reached during the development of safety prediction models for intersections and highway segments in Texas. Models were developed for urban and suburban arterial intersections, urban and suburban arterial street segments, rural multilane highway segments, and urban and rural freeway segments. |
| FHWA Report FHWA-CFL/TD-06-008 – Driver Understanding of Red Retroreflective Pavement Markers. P. Carlson and J. Miles. This study investigated drivers’ understanding of red RRPMs as traditionally used (i.e., to mark wrong way direction on one-way highways) and as used in unique applications. The findings show that drivers do not become confused when red RRPMs are used on undivided highways. Furthermore, the understanding rate of drivers from left-hand drive countries was always improved when supplemental red RRPMs were included on undivided highways. The findings also show that red RRPMs do little to help drivers understand that they are traveling the wrong direction on one-way divided highways. In areas where driver confusion may be a problem, the findings show that directional pavement marking arrows provide much better means of communication to all drivers. |
| TxDOT Report 0-5439-1 - Development of Guidelines for Establishing Effective Curve Advisory Speeds. J. Bonneson, M. Pratt, J. Miles, and P. Carlson. This document summarizes the research conducted and the findings from a two-year investigation of driver behavior on horizontal curves on rural two-lane highways. The findings from the research were used to develop criteria for setting the curve advisory speed, a method for determining this speed, and guidelines for identifying appropriate curve-related traffic control devices. |
| TxDOT Report 0-4703-4 - Development of Tools for Evaluating the Safety Implications of Highway Design Decisions. James Bonneson, Dominique Lord, Karl Zimmerman, Kay Fitzpatrick, and Mike Pratt. This document summarizes the research conducted and the findings for the initial three years of the project. This research included a review of the TxDOT design and safety evaluation process, identification of the safety information sources and needs, identification of the data needed to use selected safety evaluation tools, assessment of the applicability of accident modification factors for design evaluation, and calibration of selected safety evaluation tools for Texas application. |
| FHWA Project DTFH68-05X-00012 - Driver Understanding of Red Raised Retroreflective Pavement Markers. Paul J. Carlson and Jeffrey D. Miles. In the United States, the use of red raised retroreflective pavement markers (RRPMs) has been traditionally reserved to mark wrong way direction on one-way roadways. There are some agencies such as the State of Hawaii and surrounding U.S. territories that use red RRPMs on undivided highways to mark wrong way direction on two-way roadways (the red RRPMs are installed on the far edgeline). This application is used in areas with frequent tourists from left-hand drive countries. The red RRPMs are used to remind these tourists that they are driving in the United States, which is a right-hand drive country. When traveling in the correct direction on these undivided highways, the red RRPMs are visible during nighttime conditions. This has raised concerns regarding drivers’ understanding of the red RRPMs.
The research investigated drivers’ understanding of red RRPMs as traditionally used (i.e., to mark wrong way direction on one-way highways) and as used in unique applications (such as described above). A laptop survey was developed and administered to almost 200 survey participants. The laptop survey featured five different roadway configurations, each with four different marking patterns. Survey participants were asked several questions aimed at determining their understanding of the markings and markers while watching the video on the laptop computers. Three participant groups were targeted for the surveys: drivers from left-hand drive countries, drivers from Hawaii, and drivers from right-hand drive countries..VIDEO CLIPS FROM SURVEY (PDF) |
| TxDOT Report 0-4703-P1 - Roadway Safety Design
Synthesis. James Bonneson, Karl Zimmerman, and Kay Fitzpatrick. This
document describes the effect of key design components on street and highway
safety. The information presented represents the findings from a critical
review of the literature and an evaluation of the reported safety trends and
relationships |
| TxDOT Report 5-4022-01-1 - In-Service Evaluation of a
Detection-Control System for High-speed Signalized Intersections.. Karl
Zimmerman and James Bonneson. This report documents the findings and
conclusions reached as a result of a three-year implementation project. An
evaluation of before-after data at five intersections equipped with the
Detection-Control System indicated that it was able to reduce delay by 14
percent, red-light violations by 58 percent, and severe crash frequency by 39
percent. |
| TxDOT Report 4538-2 - Development of Ramp Design Procedures
for Facilities Without Frontage Roads. J. Bonneson, K. Zimmerman, C.
Messer, D. Lord, and M. Wooldridge. The objective of the research is to develop
recommended design procedures for interchange ramps on facilities without
frontage roads. This report documents the research conducted to develop the
ramp design guidelines. |
| TxDOT Report 0-4196-2 - Development of Guidelines for
Identifying and Treating Locations with a Red-Light-Running Problem. James Bonneson and Karl Zimmerman.. This report documents the work performed
and conclusions reached as a result of a two-year research project. During the
first year, the researchers determined that about 37,700 red-light-related
crashes occur each year in Texas. During the second year, red-light-related
crash and violation prediction models were developed. These models were used to
quantify the effect of various intersection features on crash and violation
frequency. The models were also used to quantify the effectiveness of officer
enforcement. Procedures were developed to identify and rank problem locations. |
| TTI/ITS RCE-01/01 Report - Actuated Controller Settings for
the Diamond Interchange with Three-phase Operation, James Bonneson,
Sangsoo Lee. This project evaluated alternative control sequences and settings
for the actuated, three-phase diamond interchange. The settings evaluated
include the minimum green interval, maximum green interval, and passage time.
The objective of this project was to develop guidelines for establishing
controller settings that would yield low-delay operation. |
| TxDOT Report 4196-1 - Review and Evaluation of Enforcement
Issues and Safety Statistics Related to Red-Light-Running. James
Bonneson, Karl Zimmerman, and Cesar Quiroga. This report describes: (1) the
findings from a review of enforcement issues related to red-light violations,
(2) the findings from an evaluation the characteristics of red-light-related
crashes in Texas, and (3) a procedure for identifying and quantifying
red-light-running-related crashes. |
| The Use of Wider Longitudinal Pavement Markings. Timothy J.
Gates and H. Gene Hawkins. ABSTRACT |
| TxDOT Report 4285-1 - Video Detection for Intersection and
Interchange Control. James Bonneson and Montasir Abbas. This research
was conducted to gather information about video detection system planning,
design, and operations and to develop guidelines that describe the
“best” practices for Texas conditions. This report documents the
findings from the information gathering and guideline development activities. |
| TxDOT Report 4022-2 - Intelligent Detection-Control System for
Rural Signalized Intersections, James Bonneson, Dan Middleton, Karl
Zimmerman, Hassan Charara, and Montasir Abbas. This report describes the
development and evaluation of an intelligent detection-control system that will
reduce the number of drivers running the red indication and improve
intersection safety. |
| TxDOT Report 4027-2 - Engineering Countermeasures to Reduce
Red-Light-Running, James Bonneson, Karl Zimmerman, and Marcus Brewer.
This report describes the evaluation of several engineering countermeasures to
red-light-running as well as guidelines for selecting appropriate
countermeasures and evaluating their performance. |
