Case Study

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).

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

Grassroots Implementation of Access Management: A Case Study from Peoria, Arizona

  • Posted on: Tue, 10/08/2013 - 17:06
  • By: shroedermay
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The First Steps

  • Access Management Champion
  • Get buy-in from internal staff and management
  • Secure funding for activities (not always required)
  • Outreach
  • Presentations
  • Websites
  • One-on-one Interactions


Next Steps (Peoria)

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

Corridor X Development Plan

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This project applied analytical tools (regional economic forecasting models, GIS, transportation planning software, and traffic simulation software) to inform the planning and development process along an emerging interstate highway corridor. It illustrated the benefits of advanced planning and access management intended to preserve the functional integrity of the corridor and its interchanges and crossroads.