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

City of Biloxi/MDOT

  • Posted on: Sun, 10/13/2013 - 22:21
  • By: shroedermay
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Access Management

U.S. Highway 90 – Beach Boulevard

No Presentation

Case Study

 

MDOT

Outline

  • Project Purpose

  • Scope of Project

  • Significant Impacts from Katrina

  • Major Impacts to Traffic

 

Summary

  • Coordinated effort with City and MDOT accomplished implementation of many of the Access Management recommendations

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

Risk-Oriented Design Approach

  • Posted on: Sun, 10/13/2013 - 22:19
  • By: shroedermay
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Common Reasons to Consider Exceptions

  • Impacts to the natural environment

  • Social or right-of-way impacts

  • Preservation of historic or cultural resources

  • Sensitivity to context or accommodating community values

  • Construction or right-of-way costs

 

Risk Management Characteristics

  • Explicitly addresses uncertainty

  • Based on the best available information

  • Part of the decision-making process

Florida's Access Management Review Committee Procedure

  • Posted on: Sun, 10/13/2013 - 22:18
  • By: shroedermay
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The Values We Used To Craft A Successful Review Process

  • Process should be consistent

  • Need to involve a multi-disciplinary management level team in each district

  • Communication between all parties is critical throughout the process

  • Florida DOT staff will use creativity and flexibility to resolve issues

 

Some Closing Thoughts

  • Look for solutions within your organization

  • We found a model process in one of our districts.

Design Exceptions and Deviations from Standards

  • Posted on: Sun, 10/13/2013 - 22:17
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Traffic Operational Analyses (TOA)

  • A TOA will be required for all development projects that are expected to generate 200 or more vehicle trips per day and for which a Traffic Impact Study (TIS) was not completed.

  • A TOA will be required for any development project for which changes in land use are intended after the completion of a TIS or TOA, if enough additional vehicle trips are being generated beyond those accounted for in the TIS or TOA, as determined by the County Coordinator.

Community Outreach in Access Management Planning

  • Posted on: Sun, 10/13/2013 - 22:17
  • By: shroedermay
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Why Outreach Matters

  • Allows you to…

  • Get essential input

  • Get in front of the issues

  • Deal effectively with potential opponents

  • Create opportunities for

    • education

    • and venting!

 

Lessons learned…

  • Define end game- outreach process objectives

  • Know your stakeholders!

  • Tailor the approach

  • Draft a Public Involvement Plan (PIP) before project start-up

Modifications for Private Access Approaches on Limited Access Facilities

  • Posted on: Sun, 10/13/2013 - 22:16
  • By: shroedermay
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Proposed Changes & Improvements

  • Use the county assessed value as the baseline value for calculating the difference vs. going through a costly and time consuming appraisal process.

  • Charge only a percentage of the determined value for changes to residential (less than 10 dwellings) and farm access.

  • Charge full amount of determined value for commercial, retail, etc…

  • Charge an administrative fee for processing requests.

Access Management Issues and Techniques at Continuous Flow Intersections (CFI’s)

  • Posted on: Sun, 10/13/2013 - 22:14
  • By: shroedermay
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Outline

  • What is a CFI?

  • Why consider a CFI?

  • Access Management Issues at a CFI

  • Potential Access Solutions

  • Questions Comments

 

Potential Access Solutions

  • Inter-parcel Access

  • Service Roads

  • Partial Median Openings

  • Right-In Only Driveways

  • Right In-Right Out Driveway on CFI Leg

  • U Turns

  • Purchase Access Rights

  • Relocate/Add Driveway

ACCESS MANAGEMENT PLANNING IN MICHIGAN

  • Posted on: Sun, 10/13/2013 - 22:13
  • By: shroedermay
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No Presentation

What we found

  • MDOT is typically getting what they pay for

  • Studies/plan preparations take 12 – 18 months

  • More than 35 studies completed

  • Cost range: $25,000 - $100,000

  • Plan/ordinance adoption rates and reasons vary

  • Numerous specific recommendations implemented

  • MDOT/local government cooperation and coordination typically improves after studies

  • Access committees often form in perpetuity

 

Canton Township Access Management Strategies

  • Posted on: Sun, 10/13/2013 - 22:12
  • By: shroedermay
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Approach/Methodology

  • Educate the Businesses

    • What is Access Management and how can it help?

    • Public Meeting

    • One-on-One meetings with business owners

  • Identify opportunities and obstacles

  • Identify priorities

  • Develop a strategy for implementation and ongoing coordination

Economic Effects of Access Management

  • Posted on: Sun, 10/13/2013 - 22:11
  • By: shroedermay
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Objective

  • Determine the economic effects of access management techniques on businesses adjacent to multilane highways.

In Favor of a Raised Median to Increase Safety?

  • Tendency is definitely negative reaction by businesses.

  • However, after median installation opinions appear to improve!

Ranking of Customer Considerations

  • App. 60% ranked “Accessibility” 4th, 5th, or 6th!

Access Management Solutions with Roundabouts

  • Posted on: Sun, 10/13/2013 - 22:10
  • By: shroedermay
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Well-designed Modern Roundabouts enhance the achievement of Access Management principles

  • Maintain Integrity of Arterials

  • Balance Mobility and Access

  • Improve Safety

  • Reduce
    Congestion

  • Extend the life of
    Infrastructure

 

 

Roundabout Operational & Safety Characteristics:

  • Driveway and intersection spacing versatility

  • Geometric flexibility (properly designed)

  • Less queuing

Access Management Solutions with Roundabouts

  • Posted on: Sun, 10/13/2013 - 22:07
  • By: shroedermay
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Well-designed Modern Roundabouts enhance the achievement of Access Management principles

  • Maintain Integrity of Arterials

  • Balance Mobility and Access

  • Improve Safety

  • Reduce
    Congestion

  • Extend the life of
    Infrastructure

 

 

Roundabout Operational & Safety Characteristics:

  • Driveway and intersection spacing versatility

  • Geometric flexibility (properly designed)

  • Less queuing

Access Management Considerations at Four Innovative Intersections

  • Posted on: Sun, 10/13/2013 - 22:06
  • By: shroedermay
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Topics

  • New Jersey Jughandle Intersection (NJJI)

  • Displaced Left Turn Intersection (DLF)

  • Median U-Turn Intersection (MUT)

  • Restricted Crossing U-Turn Intersection (RCUT)

Summary

  • All unconventional intersection designs are conceived to take advantage of the local traffic pattern

  • Their main design objectives are to improve LOS of critical movements, maintain or improve overall safety at main intersection, and generate tolerable delays to non-critical movements

Arizona & New Mexico Access Program Developments

  • Posted on: Sun, 10/13/2013 - 22:04
  • By: shroedermay
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New Mexico’s Goals (2009-10)

  • Update and improve current manual, regulations and internal policies.

  • Provide training

  • Budgeted for phase 1

Switch from Guide to Rules

  • Mostly procedures w/o criteria

  • All design issues pointed to Green Book

  • Not effective program

  • Not preserving function or safety

  • Lacked ability to address accumulative impacts

  • Little criteria to deny a request

 

Started with

The Convergence of Statewide Policy, Local Initiatives, and Private Development in Virginia

  • Posted on: Tue, 10/08/2013 - 21:45
  • By: shroedermay
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What is Virginia trying to reduce/remove?

  • traffic congestion
  • dangerous streets & intersections
  • new construction
  • widening projects

Takeaway #1

  • Not all arterials are created equal
    • Long distance trips with few access points
    • Local traffic with many access points
  • Design speed must be appropriate for the context
  • Road should change with the land use

Takeaway #2

Using the HSM 2010 to Predict Intersection Crashes in Corvallis, OR

  • Posted on: Tue, 10/08/2013 - 21:43
  • By: shroedermay
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Outline:

  • Introduction
  • Crash Analysis
  • HSM 2010 Predictive Method
  • Case Study
  • Discussion

Site-specific EB Method

  • Combines observed crash frequency with the predictive model estimate
  • Reduces effects of regression-to-the-mean
  • Both SPF and Crash data must be available

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

 

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