Safety Analysis of Driveway Characteristics in South Carolina Using GIS

  • Posted on: Tue, 04/25/2017 - 14:41
  • By: fbroen
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The overall goal of this project is to enhance SCDOT’s current access management practices resulting in a reduction in crashes, injuries, and fatalities on South Carolina roadways as well as improved traffic flow. 

Findings & Conclusions

Raised Median - Economic Impact and Safety Research Findings; Application for Cooper Street

  • Posted on: Sun, 10/13/2013 - 22:21
  • By: shroedermay
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FM 157 General Findings

  • Crash frequency decreasing

  • Fewer crashes involving left-turns

  • No migration of crashes to intersections

  • Very few U-turn crashes

  • Crash severity decreasing

  • Travel times generally unchanged to small increases

A Weighted Methodology for Access Density Analysis

  • Posted on: Sun, 10/13/2013 - 22:20
  • By: shroedermay
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OUTLINE

  • INTRODUCTION

  • APPLICATIONS

  • OBJECTIVES

  • METHODOLOGY

  • DATA COLLECTION

  • DATA ANALYSIS

  • STATISTICAL TESTS

  • RECOMMENDATIONS AND CONCLUSIONS

 

OBJECTIVES

1. To conduct a thorough literature review to study the existing methods of computing access density

2. To apply different computational methods of access density and studying their differences

Sample Applications of the HSM to Access Management

  • Posted on: Tue, 10/08/2013 - 21:42
  • By: shroedermay
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II. HSM for Urban Suburban Multilane Streets

  • Access Density is a known effect
  • Driveways are grouped by type:
    • Commercial
    • Institutional
    • Residential
    • Other
  • Driveways are either “minor” or “major” if have 50 or more parking spaces

“Lessons Learned”

  • The Highway Safety Manual is “Functionally Based”
  • The 4D model works acceptably to model 6 lane arterial street

 

Access Retrofit of a Corridor And Other Masochistic Behaviors

  • Posted on: Tue, 10/08/2013 - 15:36
  • By: shroedermay
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Market Characteristics

  • How much development can be realistically absorbed in this area?
  • How will market area be sustained?
  • What message will be crafted for key stakeholders?

Measures of Effectiveness

  • Safety
  • Market Area (Sustainability)
  • Walkability
  • Natural Environment

Implementation and Integration

  • Public Involvement/Information
  • Access Controls
  • Land Use Controls
  • Formative Measures/Revisiting

Design Considerations of a Corridor Retrofit

Safety Effects of Median Modification Using Quick Kurb (QK)

  • Posted on: Tue, 10/08/2013 - 15:34
  • By: shroedermay
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Conclusions & Recommendations

  • Effective Temporary Median Treatment
  • Construction: Shorter Time and Less Cost
  • Safety Effects
  • Reduction on Left-Turn Related Crashes
  • Total Crashes: Reduced for most of applications except full median closure from bi-directional median opening
  • Benefit/Cost Ratio
  • Bi-directional Channelization: 8-12
  • One-directional Channelization: 3-5

 

Limitations & Next Step

Safety Impacts of Access Management: Two Case Studies

  • Posted on: Mon, 09/23/2013 - 21:04
  • By: fbroen
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Presentation Outline

  • Case Study 1-Nebraska Avenue Lane Diet

    • Before: 4-lane undivided

    • After: 2-lane divided with TWLTL

  • Case Study 2-Hillsborough Avenue Median Installation

    • Before: 6-lane with TWLTL

    • After: 6-lane with raised medians

 

Case Study 1: Discussion

  • Significant Safety Improvement

  • Improvement of all Analyzed Crash Types

  • From Worse to Better than SW Average

A New Look at Driver Perception - Reaction Time at Driveways

  • Posted on: Fri, 08/30/2013 - 22:53
  • By: fbroen
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Oregon State University
AM1220Dixon

As part of the AMAG project, Karen Dixon used a driving simulator to study the driver perception - reaction time of drivers of different ages. 

Overview

  • Defining the Problem
  • Study Currently in Progress
  • Concluding Remarks

Next Steps

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