Synthesis of Information Related to Highway Problems. Topic 39-09. Design Flexibility Considerations for Established Cities

<p class="MsoBodyTextIndent" style="MARGIN: 0pt; TEXT-INDENT: 0pt"><span style="FONT-SIZE: 11pt; COLOR: black; mso-bidi-font-size: 10.0pt"><font face="Times New Roman">The AASHTO "Green Book" has long been the mainstay of road design across the country and has helped establish uniform design and implementation of road facilities. The Green Book is based in large part on idealized design circumstances without, typically, right-of-way, utility, historic, built urban form, or environmental constraints. </font></span><span style="FONT-SIZE: 11pt; COLOR: black; mso-bidi-font-size: 10.0pt"><font face="Times New Roman">It is often a challenge to achieve consensus in large cities where it is frequently not feasible to follow strictly Green Book standards.<span style="mso-spacerun: yes">  </span>Time and resources are spent justifying design exceptions and variances to established standards and affecting such items as road appearance and structure, lane width, turning radius, taper rate and roadway/intersection level of service.<span style="mso-spacerun: yes">  </span>Solutions must be developed, negotiated, approved, and shared with the profession.<span style="mso-spacerun: yes">  </span>For example, one city had to request over 100 design variances that while ultimately were resolved, caused significant project delay and cost escalation. A s</font></span><span style="FONT-SIZE: 11pt; mso-bidi-font-size: 10.0pt"><font face="Times New Roman">ynthesis is needed to address national practice for reaching a reasonable accommodation between the idealized Green Book standards and the "built" urban environment.<span style="mso-spacerun: yes">  </span>Stakeholders are looking for effective strategies for designing in an urban environment and satisfying local needs.<span style="mso-spacerun: yes"> </span></font></span><span style="FONT-SIZE: 11pt; mso-bidi-font-size: 10.0pt"><font face="Times New Roman">The scope of this project is focused on transportation design issues in the urban core of major cities.<span style="mso-spacerun: yes">  </span></font></span></p>

Language

  • English

Project

  • Status: Completed
  • Funding: $30000.00
  • Contract Numbers:

    Project 20-05, Topic

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    National Cooperative Highway Research Program (NCHRP) Synthesis

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC    20001
  • Project Managers:

    Vlasak, Donna

  • Performing Organizations:

    University of Alabama, Huntsville

    Department of Civil and Environmental Engineering
    Huntsville, AL  United States  35899
  • Principal Investigators:

    Stamatiadis, Nikiforos

  • Start Date: 20071101
  • Expected Completion Date: 0
  • Actual Completion Date: 20090227
  • Source Data: RiP Project 15454

Subject/Index Terms

Filing Info

  • Accession Number: 01464753
  • Record Type: Research project
  • Source Agency: National Cooperative Highway Research Program
  • Contract Numbers: Project 20-05, Topic
  • Files: TRB, RiP, USDOT
  • Created Date: Jan 3 2013 2:48PM