Documents

Alabama Access Management Manual

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The purpose of the Alabama Department of Transportation (ALDOT) Access Management Manual is to set out standards for managing access to and from state roads and highways.

Goals of access management include:

  • protecting the health, safety and welfare of the public
  • maintaining the highway rights-of-way
  • preserving the functional level of state roads and highways while meeting the needs of the motoring public

 

Alabama Department of Transportation Access Design and Management Manual

1 Introduction

1998 National Conference on Access Management

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The 1998 National Conference on Access Management, held in Ft. Lauderdale, Florida, from October 4 to October 7, 1998, was sponsored by the Transportation Research Board’s Committee on Access Management and the Federal Highway Administration Office of Technology Applications. The Florida Department of Transportation hosted the Conference.

2006 Conference on Access Management

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Conference Proceedings The 7th Conference on Access Management was held in Park City, Utah on August 13th to 16th, 2006. This website and Access Management DVD Library 2007 contain most of the presentations from the conference. The conference proceedings are posted on the http://teachamerica.com/accessmanagement.info/2006conference.html . The session topics were chosen to match the Chapters in the TRB Access Management Manual.

Benefit-and-Cost Analysis of Strategic Acquisition of Limited Access Right-of-Way near Interchanges

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The purpose of this study was to determine whether acquiring additional limited access right-of-way (ROW) at the time an interchange is built and before the surrounding area is subdivided and developed, is in fact cost effective in light of potential costs and benefits. The study methodology included the following: (1) traffic operations analysis of the interchange with varying configurations of signalized access spacing, (2) safety analysis of interchanges with varied access spacing in Florida, and (3) a cost/benefit analysis of acquiring varying amounts of limited access ROW.

Access Management and NEPA: MoDOT's Experience with the I-70 Second Tier Studies

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The Missouri Department of Transportation (MoDOT) is conducting a group of studies to determine how to improve 200 miles of Interstate 70 between St. Louis and Kansas City. Addressing access within the functional boundary of interchanges is a key element of the project. The paper first briefly reviews I-70 decision making studies and MoDOT's access management guidelines. Attention is then focused on access management and the National Environmental Policy Act (NEPA).

Corridor Planning in Wisconsin: A Work in Progress

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The Wisconsin Department of Transportation (WisDOT) has begun experimenting with new combinations of tools aimed at addressing transportation problems within their community context. The most extensive and deliberate use of these tools is corridor planning. Corridor planning is an approach that is rooted in collaboration with local communities to address all the issues of context that are beyond the purview of the state transportation agency.

Use of MicroSimulation to Convey Access Management Techniques

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The Missouri Department of Transportation has utilized several microsimulation software packages to analyze the impacts of proposed designs, such as interchange footprint and outer road spacing. Traditionally, one of the most difficult aspects of a project has been providing a clear understanding of the final product to the public. This paper discusses the use of visual simulation models to convey access management techniques to the general public.

Sixth National Conference on Access Management, August 29-September 1, 2004, Kansas City, Missouri

Minnesota Trunk Highway 10 Anoka County Business Stakeholder Involvement Process

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The process involved the development of a corridor economic profile, a business inventory and classification study to determine the businesses most likely to be impacted by access changes, a set of detailed business interviews, a business forum, and a business-oriented design charette.

Performance-Based Safety Evaluation of Requests for New Access or Modifications to Existing Access on Freeways

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Freeway access management activities have traditionally taken a nominal approach to safety. Acceptable safety performance is presumed to result from attaining some desired interchange or ramp spacing. This approach oversimplifies driver behavior and complex interactions between roadway geometrics, traffic operations, and safety. The objective of this paper is to quantify the relationship between ramp spacing and freeway safety, with safety defined as number of accidents, or accident consequences, by kind and severity, expected to occur during a specified time period.

Safety Impacts of Access Management: Two Case Studies

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Peter Hsu, P.E.

Florida Department of Transportation

District 7

 

W. T. Bowman, P.E

Tindale-Oliver & Associates, Inc.

Tampa, FL

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

NCHRP 650: Median Intersection Design for Rural High-Speed Divided Highways

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TRB’s National Cooperative Highway Research Program (NCHRP) Report 650: Median Intersection Design for Rural High-Speed Divided Highways explores common safety issues at median intersections on rural divided highways, and examines innovative geometric and operational treatments for addressing those issues. The report includes ten case studies that illustrate how various treatments have been applied in the field.

NCHRP Report 420 Impacts of AM Techniques

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This report classifies access management techniques and presents methods for estimating the safety and operational effects of the different techniques. For some techniques, quantitative assessment was not practical and case studies are presented to demonstrate good and poor practice. This report will be very useful to those developing access guidelines and policy and those analyzing specific access situations. 

The Relationship Between Access Density and Accident Rates: Comparisons of NCHRP Report 420 and Minnesota Data

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This digest summarizes findings of National Cooperative Highway Research Program (NCHRP) Project 3-52A, "Impacts of Access-Management Techniques." NCHRP Report 420, "Impacts of Access Management Techniques" (1999), presents relationships between access density and accident rates. This digest uses additional data from Minnesota to confirm these relationships. The digest is organized as follows: Introduction; Problem Statement; Objective and Approach; Background; Results; Comparisons; and Accident Rate Indices. 

NCHRP Synthesis 348: Improving the Safety of Older Road Users

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TRB's NCHRP Synthesis 348: Improving the Safety of Older Road Users examines programs and policies in place across the country to improve the safety and mobility of older road users. The report documents a range of strategies and related programs under way in roadway engineering, driver licensing, public information and education, and enforcement and adjudication.

 

Regional Implementation of Access Management

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The Maricopa Association of Governments (MAG) conducted a survey of Metropolitan Planning Organizations (MPOs) to assess the implementation of access management at the regional level. The intent of the survey was to determine if access management was being implemented at the regional level; what had been implemented; and how implementation was achieved. Survey responses were divided into three categories: all respondents, respondents serving a population of one million or more (population subset), and respondents serving 25 or more member agencies (agency subset).

Development of the Des Moines Access Management Plan

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Plazak, D., A. Garms, and J. Rees, Development of the Des Moines Access Management Plan, prepared for the Iowa Department of Transportation, Iowa State University (2004);   [Plazak, D., A. Garms, and J. Rees, “Access Management Plan and Program for Des Moines, Iowa, Metropolitan Area,” Transportation Research Record: Journal of the Transportation Research Board, No 1981, Transportation Research Board of the National Academies, Washington, D.C. (2006); Plazak, D., A. Garms, and J.

Update of Florida Crash Reduction Factors and Countermeasures to Improve the Development of District Safety Improvement Projects

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Gans, A., J. Shen, and A. Rodriguez, Update of Florida Crash Reduction Factors and Countermeasures to Improve the Development of District Safety Improvement Projects, prepared for the Florida Department of Transportation, (April 2005)

      This report includes numerous citations of operational and geometric modifications impact crash types. Some of which are access management related.

Proposal for Incorporating Public Transit Provisions into a State Highway Access Management Code

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Lutin, J. M., “Proposal for Incorporating Public Transit Provisions into a State Highway Access Management Code,” Transportation Research Record: Journal of the Transportation Research Board, No. 2171 , Transportation Research Board of the National Academies, Washington, D.C., (2010) pp. 52-56.

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