Exploration and Development of Crash Modification Factors and Functions for Single and Multiple Treatments PDF Download
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Author: Juneyoung Park Publisher: ISBN: Category : Languages : en Pages : 232
Book Description
In this dissertation, the CMFs and CMFunctions are estimated for various single and combination of treatments for different roadway types (e.g. rural two-lane, rural multi-lane roadways, urban arterials, freeways, etc.) as below: [bullet] Treatments for mainline of roadway: [bullet] adding a thru lane, conversion of 4-lane undivided roadways to 3-lane with two-way left turn lane (TWLTL) [bullet] Treatments for roadway shoulder: [bullet] installing shoulder rumble strips, widening shoulder width, adding bike lanes, changing bike lane width, installing roadside barriers [bullet] Treatments related to roadside features: [bullet] decrease density of driveways, decrease density of roadside poles, increase distance to roadside poles, increase distance to trees Expected contributions of this study are to 1) suggest approaches to estimate more reliable safety effects of multiple treatments, 2) propose methodologies to develop CMFunctions to assess the variation of CMFs with different characteristics among treated sites, and 3) recommend applications of using GNM and MARS to simultaneously consider the interaction impact of more than one variables and nonlinearity of predictors. Finally, potential relevant applications beyond the scope of this research but worth investigation in the future are discussed in this dissertation.
Author: Juneyoung Park Publisher: ISBN: Category : Languages : en Pages : 232
Book Description
In this dissertation, the CMFs and CMFunctions are estimated for various single and combination of treatments for different roadway types (e.g. rural two-lane, rural multi-lane roadways, urban arterials, freeways, etc.) as below: [bullet] Treatments for mainline of roadway: [bullet] adding a thru lane, conversion of 4-lane undivided roadways to 3-lane with two-way left turn lane (TWLTL) [bullet] Treatments for roadway shoulder: [bullet] installing shoulder rumble strips, widening shoulder width, adding bike lanes, changing bike lane width, installing roadside barriers [bullet] Treatments related to roadside features: [bullet] decrease density of driveways, decrease density of roadside poles, increase distance to roadside poles, increase distance to trees Expected contributions of this study are to 1) suggest approaches to estimate more reliable safety effects of multiple treatments, 2) propose methodologies to develop CMFunctions to assess the variation of CMFs with different characteristics among treated sites, and 3) recommend applications of using GNM and MARS to simultaneously consider the interaction impact of more than one variables and nonlinearity of predictors. Finally, potential relevant applications beyond the scope of this research but worth investigation in the future are discussed in this dissertation.
Author: Daniel Lance Carter Publisher: ISBN: 9780309686860 Category : Roads Languages : en Pages : 0
Book Description
Crash modification factors (CMF) provide transportation professionals with the kind of quantitative information they need to make decisions on where best to invest limited safety funds.
Author: David L. Harkey Publisher: ISBN: Category : Transportation Languages : en Pages : 92
Book Description
TRB¿s National Cooperative Highway Research Program (NCHRP) Report 617: Accident Modification Factors for Traffic Engineering and ITS Improvements explores the development of accident modification factors (AMFs) for traffic engineering and intelligent transportation system improvements. AMFs, also known as crash reduction factors, are designed to provide a simple and quick way of estimating the safety impacts of various types of engineering improvements, encompassing the areas of signing, alignment, channelization, and other traffic engineering solutions.
Author: Publisher: ISBN: 9780309702546 Category : Traffic accidents Languages : en Pages : 0
Book Description
Highway safety practitioners were given a significant new tool in 2010 with the publication of the AASHTO Highway Safety Manual. In the HSM, crash modification factors (CMFs) were provided to estimate the safety effects for a variety of treatments or countermeasures. The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 352: Crash Modification Factors in the Highway Safety Manual: Resources for Evaluation provides the appendices to NCHRP Research Report 1029: Crash Modification Factors in the Highway Safety Manual: A Review.
Author: David K. Merritt Publisher: ISBN: Category : Roads Languages : en Pages : 75
Book Description
This report documents results and observations from friction testing of high-friction surface treatments (HFSTs) as part of an FHWA research study, Developing Crash-Modification Factors for High-Friction Surface Treatments. This larger study provides high-quality crash-modification factors and benefit–cost ratios for HFST with calcined bauxite aggregate and recommends materials and specifications for applying HFST to effectively reduce roadway departure crashes. Friction testing was performed to document the friction of the HFST and underlying pavement. For a number of sites, friction testing was performed on the existing pavement surface before HFST installation and on the HFST after installation. In some cases, testing of the pavement leading up to and away from existing HFST sites was used to estimate the friction of the underlying pavement for comparison to HFST friction. To evaluate friction change of HFST over time, friction testing was also performed on several older HFST installations where previous friction data had been collected. All friction testing was performed with a highway friction tester, a continuous fixed-slip measurement device that provides a continuous plot of friction reported in 0.30-meter (1-foot) increments through the section of pavement tested. The advantage of continuous friction measurement is that variations in friction (e.g., through a curve) can be documented. The friction data collected during this research and documented in this report were evaluated for friction change before and after HFST installation, friction change of the HFST and existing pavement over time, and friction change within a curve.
Author: U.S. Department of Health and Human Services Publisher: Lulu.com ISBN: 1794755136 Category : Reference Languages : en Pages : 208
Book Description
Motivation is key to substance use behavior change. Counselors can support clients' movement toward positive changes in their substance use by identifying and enhancing motivation that already exists. Motivational approaches are based on the principles of person-centered counseling. Counselors' use of empathy, not authority and power, is key to enhancing clients' motivation to change. Clients are experts in their own recovery from SUDs. Counselors should engage them in collaborative partnerships. Ambivalence about change is normal. Resistance to change is an expression of ambivalence about change, not a client trait or characteristic. Confrontational approaches increase client resistance and discord in the counseling relationship. Motivational approaches explore ambivalence in a nonjudgmental and compassionate way.
Author: Juneyoung Park
Author: Juneyoung Park
Author: David K. Merritt
Author: 
Author: David K. Merritt
Author: Daniel Lance Carter
Author: David L. Harkey
Author: 
Author: David K. Merritt
Author: Ezra Hauer
Author: U.S. Department of Health and Human Services