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Crash Modification Factors, Predictive Hotspot Identification, and Treatment Selection in Texas and Peer States
Crash Modification Factors, Predictive Hotspot Identification, and Treatment Selection in ...
Crash Modification Factors, Predictive Hotspot Identification, and Treatment Selection in Texas and Peer States

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260311091547.5
ISBN  
9798270232641
DDC  
519.72
저자명  
Hasan, Manar
서명/저자  
Crash Modification Factors, Predictive Hotspot Identification, and Treatment Selection in Texas and Peer States / Manar Hasan
발행사항  
[Sl] : The University of Texas at Austin, 2025
형태사항  
1 electronic resource (283 pages)
주기사항  
Source: Dissertations Abstracts International, Volume: 87-06, Section: A.
주기사항  
Advisors: Machemehl, Randy B. Committee members: Bhasin, Amit; Boyles, Stephen; Jiao, Junfeng.
학위논문주기  
- Ph.D. : The University of Texas at Austin, 2025.
초록/해제  
요약Safety is crucial in transportation, with huge human and property costs associated with every crash. Proactive data-driven decision-making is key in determining safety treatments that will have maximum positive impact. Traditional processes rely on historical crash data, generalized Crash Modification Factors (CMFs), and reactive interventions, often limiting their effectiveness. This dissertation addresses three challenges in safety decision-making: (1) assessing the reliability of currently used CMFs in estimating crash reductions, (2) identifying future high-risk crash locations, and (3) analytically performing treatment selection to maximize safety benefits. First, this dissertation evaluates the accuracy of CMFs currently used by transportation agencies by comparing expected crash reductions with observed outcomes. The findings reveal that some CMFs closely align with real-world crash data, while others, may overestimate or underestimate safety benefits. Also, CMFs can vary significantly for different crash severity levels, so jurisdictions that use one generalized value are inaccurately estimating safety treatment effects. Second, the dissertation performs predictive hotspot identification, leveraging Poisson and Random Forest models to forecast crash-prone locations. The models demonstrate good predictive performance, with traffic volume (ADT), traffic factors (peak hour factor, directional factor), speed limits, and surface width emerging as key factors influencing crash risk. The results suggest that integrating statistical and machine learning analyses into safety planning can aid proactive crash prevention, shifting from traditional reactive approaches. Finally, the dissertation proposes a quantitative, data-driven framework for treatment selection. Using propensity score matching (PSM) and predictive modeling with many models (Difference-in-Differences, Linear Regression, Random Forest, Gradient Boosting, Poisson, Negative Binomial, XGBoost, SVR, and Neural Network), the research evaluates treatment effectiveness across different roadway conditions and treatments. The findings highlight models that performed better than others (Poisson, Negative Binomial, Gradient Boosting, Random Forest, and XGBoost), and also some conditions which make certain treatments more effective. This research contributes to the field of transportation safety by integrating traditional statistical methods with modern predictive analytics, providing a comprehensive, proactive approach to roadway safety decision-making.
언어주기  
English
일반주제명  
Statistics
일반주제명  
Transportation
일반주제명  
Information science
키워드  
Crash Modification Factors
키워드  
Traffic volume
키워드  
Propensity score matching
키워드  
Predictive hotspot identification
기타저자  
The University of Texas at Austin Civil Architectural and Environmental Engineering
기본자료저록  
Dissertations Abstracts International. 87-06A.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■040    ▼aMiAaPQD▼beng▼cMiAaPQD▼erda
■082    ▼a519.72
■1001  ▼aHasan,  Manar▼eauthor.
■24510▼aCrash  Modification  Factors,  Predictive  Hotspot  Identification,  and  Treatment  Selection  in  Texas  and  Peer  States  ▼cManar  Hasan
■260    ▼a[Sl]▼bThe  University  of  Texas  at  Austin▼c2025
■264  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a1  electronic  resource  (283  pages)
■336    ▼atext▼btxt▼2rdacontent
■337    ▼acomputer▼bc▼2rdamedia
■338    ▼aonline  resource▼bcr▼2rdacarrier
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-06,  Section:  A.
■500    ▼aAdvisors:  Machemehl,  Randy  B.    Committee  members:  Bhasin,  Amit;  Boyles,  Stephen;  Jiao,  Junfeng.
■5021  ▼bPh.D.▼cThe  University  of  Texas  at  Austin▼d2025.
■520    ▼aSafety  is  crucial  in  transportation,  with  huge  human  and  property  costs  associated  with  every  crash.  Proactive  data-driven  decision-making  is  key  in  determining  safety  treatments  that  will  have  maximum  positive  impact.  Traditional  processes  rely  on  historical  crash  data,  generalized  Crash  Modification  Factors  (CMFs),  and  reactive  interventions,  often  limiting  their  effectiveness.  This  dissertation  addresses  three  challenges  in  safety  decision-making:  (1)  assessing  the  reliability  of  currently  used  CMFs  in  estimating  crash  reductions,  (2)  identifying  future  high-risk  crash  locations,  and  (3)  analytically  performing  treatment  selection  to  maximize  safety  benefits.                        First,  this  dissertation  evaluates  the  accuracy  of  CMFs  currently  used  by  transportation  agencies  by  comparing  expected  crash  reductions  with  observed  outcomes.  The  findings  reveal  that  some  CMFs  closely  align  with  real-world  crash  data,  while  others,  may  overestimate  or  underestimate  safety  benefits.  Also,  CMFs  can  vary  significantly  for  different  crash  severity  levels,  so  jurisdictions  that  use  one  generalized  value  are  inaccurately  estimating  safety  treatment  effects.                        Second,  the  dissertation  performs  predictive  hotspot  identification,  leveraging  Poisson  and  Random  Forest  models  to  forecast  crash-prone  locations.  The  models  demonstrate  good  predictive  performance,  with  traffic  volume  (ADT),  traffic  factors  (peak  hour  factor,  directional  factor),  speed  limits,  and  surface  width  emerging  as  key  factors  influencing  crash  risk.  The  results  suggest  that  integrating  statistical  and  machine  learning  analyses  into  safety  planning  can  aid  proactive  crash  prevention,  shifting  from  traditional  reactive  approaches.                        Finally,  the  dissertation  proposes  a  quantitative,  data-driven  framework  for  treatment  selection.  Using  propensity  score  matching  (PSM)  and  predictive  modeling  with  many  models  (Difference-in-Differences,  Linear  Regression,  Random  Forest,  Gradient  Boosting,  Poisson,  Negative  Binomial,  XGBoost,  SVR,  and  Neural  Network),  the  research  evaluates  treatment  effectiveness  across  different  roadway  conditions  and  treatments.  The  findings  highlight  models  that  performed  better  than  others  (Poisson,  Negative  Binomial,  Gradient  Boosting,  Random  Forest,  and  XGBoost),  and  also  some  conditions  which  make  certain  treatments  more  effective.                        This  research  contributes  to  the  field  of  transportation  safety  by  integrating  traditional  statistical  methods  with  modern  predictive  analytics,  providing  a  comprehensive,  proactive  approach  to  roadway  safety  decision-making.
■546    ▼aEnglish
■590    ▼aSchool  code:  0227
■650  4▼aStatistics
■650  4▼aTransportation
■650  4▼aInformation  science
■653    ▼aCrash  Modification  Factors
■653    ▼aTraffic  volume
■653    ▼aPropensity  score  matching
■653    ▼aPredictive  hotspot  identification
■7102  ▼aThe  University  of  Texas  at  Austin▼bCivil,  Architectural,  and  Environmental  Engineering.▼edegree  granting  institution.
■7201  ▼aMachemehl,  Randy  B.▼edegree  supervisor.
■7730  ▼tDissertations  Abstracts  International▼g87-06A.
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17361235▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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