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Highway Functional Classification. PEAR Workshop September 2009 Spencer Stevens, Planning Office Joe Hausman, Office of Highway Information Ed Christopher, Resource Center . Highway Functional Classification. What? Why? How? Relationship to Federal-Aid Relationship to Design

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Highway FunctionalClassification

PEAR Workshop

September 2009

Spencer Stevens, Planning Office

Joe Hausman, Office of Highway Information

Ed Christopher, Resource Center


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Highway FunctionalClassification

  • What?

  • Why?

  • How?

  • Relationship to Federal-Aid

  • Relationship to Design

  • October 2008 HPMS memo


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What is the function of a road?

  • Provides mobility (arterials)

  • Provides access (locals)

  • Provides both (collectors)


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Relationship to service


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Functional Classification?


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Functional Classification?


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Functional Classification?


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Why classify roads?

  • There are approximately 4,000,000 miles of roads in the U.S.

  • Some are more “important” than others


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Why classify roads?

  • Helps determine which level of government has responsibility

  • Influences design

  • Affects how they are funded

  • Impacts Federal-Aid


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Rural Illustration


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Rural Guides


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Highway Functional Classes (Rural Miles)

  • Principal arterials 132,451 (4%)

  • Minor arterials137,875 (4%)

  • Major collectors434,090(14%)

  • Minor collectors272,047(9%)

  • Local 2,096,837(68%)

  • Total 3,071,331


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Urban Illustration


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Urban Guides


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Highway FunctionalClasses (Urban miles)

  • Principal arterials76,033(9%)

  • Minor arterials90,475(10%)

  • Collectors89,310(10%)

  • Local 628,369(71%)

  • Total 884,187


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Federal-Aid

  • National Highway System

    • Principal arterials

  • Surface Transportation Program

    • Arterials

    • Urban collectors

    • Rural major collectors


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How?

  • Group population centers and major travel generators

  • Identify neighboring centers

  • Connect the largest directly

  • Connect the next group to the major centers


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How?

  • Considerations:

    • Arterials integrated network

    • Spacing

    • Changes at urban boundaries

    • Trip length

    • Diminishing returns


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Urban Boundaries

  • Urban clusters

    • Census block population density

    • Secondary criteria

  • Urban Places

    • Political boundaries

  • Adjusted boundaries


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Design Considerations

  • AASHTO’s Policy on Geometric Design of Highways and Streets 2001 (Green book)

  • Arterials – promote mobility and restrict access

  • Locals – promote access and limit mobility


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Design Features

  • Speed

  • Levels of service

  • Alignment

  • Width

  • Clearances

  • Grades


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Urban Features

  • Parking

  • Lighting

  • Curb & Gutter

  • Sidewalks

  • Utilities


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Access Control

  • Full control

    • Freeway

  • Partial control

    • Medians

    • Grade separation

    • Signal timing

    • Limit driveways and entrances


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Access Control Methods

  • Land use ordinances

  • Geometric design

    • Medians

    • Spacing median openings

    • Frontage roads

  • Direct vs. indirect access

  • Single vs. multiple access


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HPMS Reassessment

  • October 14, 2008 memo

  • Recommends revisions to highway functional classification guidebook

    • Downplays the Urban/Rural distinction

  • New HPMS classification schema used for 2010 data reporting

  • Does NOT change any Highway Functional Classification Guidance or practice


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Summary

  • What is the function of roads?

  • Why classify the roads?

    • Example of impact on design

  • Which roads are eligible for Federal-Aid?


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Highway Functional Classification Concepts, Criteria and Procedures

  • It is just a guide

  • Varies in practice by state

  • Functional Class boundaries are not rigid

  • Some states develop supplemental criteria

  • www.fhwa.dot.gov/planning/fctoc.htm


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Main Street

State University

Campus Loop

I-95


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Census Urban Boundary

Industrial Blvd

Industrial Park


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The village of Mesa

Mesa View Road

Red Rock Heights

Route 36


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Resource Page

http://www.edthefed.com/fclass/


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Yepper – We Can Assist You?

SelectHere

http://www.dot.state.pa.us/Internet/Bureaus/pdPlanRes.nsf/PlanningAndResearchHomePage?OpenFrameset


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Yunz Please Refer To…


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Then Submit per…


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FHWA Appreciates the Process!


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