slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Hongyi Chen, Ph.D. Assistant Professor Mechanical and Industrial Engineering Department PowerPoint Presentation
Download Presentation
Hongyi Chen, Ph.D. Assistant Professor Mechanical and Industrial Engineering Department

Loading in 2 Seconds...

play fullscreen
1 / 14

Hongyi Chen, Ph.D. Assistant Professor Mechanical and Industrial Engineering Department - PowerPoint PPT Presentation


  • 96 Views
  • Uploaded on

Developing an Intelligent Decision Support System for the Proactive Implementation of Traffic Safety Strategies. Hongyi Chen, Ph.D. Assistant Professor Mechanical and Industrial Engineering Department University of Minnesota Duluth. The Research Problem.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Hongyi Chen, Ph.D. Assistant Professor Mechanical and Industrial Engineering Department' - brigid


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Developing an Intelligent Decision Support System for the Proactive Implementation of Traffic Safety Strategies

Hongyi Chen, Ph.D.

Assistant Professor

Mechanical and Industrial Engineering Department

University of Minnesota Duluth

NATSRL Research Advisory Panel Meeting 09/14/2010

the research problem
The Research Problem
  • Goal: Continuously improving transportation safety and reducing crash rate through the implementation of traffic safety strategies
  • Challenges:
    • The implementation and maintenance of these strategies represents significant investment
    • Resources ($) are always limited
  • Research Question:

How to effectively and proactively implement the traffic safety strategies so that the overall improvement to the transportation safety is maximized while the total implementation and maintenance cost is minimized/under budget?

NATSRL Research Advisory Panel Meeting 09/14/2010

research objectives
Research Objectives
  • Develop an algorithm to assess the effectiveness of a combination of safety strategies in reducing crash rate under various road and weather conditions.
  • Explore research methods to identify and assess the dependencies of safety improvements implemented in related locations
  • Develop an optimization model for systematic implementation of traffic safety strategies considering the dependencies.
  • Develop an intelligent decision support system based on the above algorithms and models. This system will have a GIS based user interface.

NATSRL Research Advisory Panel Meeting 09/14/2010

slide4

Decision Support System (1/4)

Next

NATSRL Research Advisory Panel Meeting 09/14/2010

slide5

Decision Support System (2/4)

LCPSI Strategies to Implement

ITS Strategies to Implement

Application Category

Name

Road Geometry

Warning

Name

ITS 1

ITS 2

ITS 3

ITS 4

ITS 5

ITS 6

LCPSI 1

LCPSI 2

LCPSI 3

LCPSI 4

LCPSI 5

LCPSI 6

Add

Add

Suggest

Total Budget ($k)

210

NATSRL Research Advisory Panel Meeting 09/14/2010

slide6

Decision Support System (3/4)

Sensitivity Analysis

Find Alternate Solution

Go Back to

Change Strategies

210

Total Budget ($k)

NATSRL Research Advisory Panel Meeting 09/14/2010

slide7

Decision Support System (4/4) -- ITS and LCPSI Strategies Implementation Data Base

Strategies Implemented

Location Implemented

ITS/LCPSI

County/City

Road segment

Application Category

Intersection

Name

Enter Notes here:

Click to Add New Locations

Click to Add New Strategies

NATSRL Research Advisory Panel Meeting 09/14/2010

the final product to be delivered
The Final Product to be Delivered

Data

Assessment Algorithm

Optimization Model

Crash modification functions, Dependence functions.

Other Information:

Cost, economic impact, etc.

NATSRL Research Advisory Panel Meeting 09/14/2010

progress update
Progress Update
  • Literature review
    • Research papers
    • The white papers for Safety Analyst software tool
    • Highway safety manual workshop slides
    • On going
  • Development of the algorithm
    • Mathematical analysis and proofs of the EB and Hauer’s coherent method
  • Hwy. 169 project
    • Data collection
    • Model designed for the before and after study and the optimization
  • GIS based software
    • Road segment prioritization
    • Working on intersection prioritization

NATSRL Research Advisory Panel Meeting 09/14/2010

questions and suggestions
Questions and Suggestions

NATSRL Research Advisory Panel Meeting 09/14/2010

back up slides
Back Up Slides

NATSRL Research Advisory Panel Meeting 09/14/2010

slide12

Npredicted=Nbase condition*[CMF1*CMF2*…*CMFn]

Examples

  • Treating a rural highway for run-off-the-road crashes
    • Widening shoulder (CMF1=0.8)
    • Install guardrails (CMF2=0.8)
    • CMF1&2=0.64?
  • Treating a horizontally curved road
    • Install speed limit signs
    • Straighten the road
    • Do both?

NATSRL Research Advisory Panel Meeting 09/14/2010

technical approach
Technical Approach

Statistical Analysis and Operations Research

  • Empirical Bayes (EB) approach
    • Before and after
    • Treated and untreated
  • Conditional probability theory
  • Regression analysis
  • Integer linear programming

NATSRL Research Advisory Panel Meeting 09/14/2010