traffic analysis toolbox & highway capacity manual transition tyrone scorsone fdot systems...

Traffic Analysis Toolbox &Highway Capacity Manual Transition

Tyrone ScorsoneFDOT Systems Planning

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Transportation Research Board’s (TRB) Highway Capacity Manual (HCM)

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HCM Quality/Level of Service (QLOS) Handbook

Facility Level Analysis Detailed Point & Segment Analysis

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Advantages of Analytical/Deterministic Tools

Quickly predict impacts

Widely accepte

d

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LOS Planning/Preliminary Engineering Tools

PreliminaryEngineering

Software

GeneralizedPlanning

Tables

http://www.dot.state.fl.us/planning/systems/sm/los/default.htm

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Capacity/LOS Analyses and Evaluation Tools

Pote

ntial

Acc

urac

y

Generalized Tables

ARTPLAN FREEPLAN HIGHPLAN

HCM | TCQSM BLOS | PLOS

TRANSYT-7F

CORSIM

(Generalized Planning)

(Preliminary Engineering)

(Simple Operational Analysis)

(Microsimulation)

Effort/Complexity

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Exporting Data to Highway Capacity Software (HCS)

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Planning Uses of LOS Techniques

Initial problem identification

Delay calculation

Future year analysis

Conducting alternatives analyses

Assessing development impacts

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Primary Uses of LOS Techniques

Site Impact Project Development

Future Year

AnalysisOther

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Transportation Impact Handbook

FDOTTransportationImpactHandbook.com

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Screen for impacts of Development

Screen for impacts of Development

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Screen for impacts of Development

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The Users Perspective

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Automobile LOS

A/B

E/F

C/D

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Modal LOSBicycle

A/B

E/F

C/D

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Modal LOSPedestrian

A/B

E/F

C/D

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Modal LOSBus 2 to 4 buses/hour

< 1 bus/hour

>4 buses/hour

A/B

E/F

C/D

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Capacity/LOS Analyses and Evaluation Tools

Pote

ntial

Acc

urac

y

Generalized Tables

ARTPLAN FREEPLAN HIGHPLAN

HCM | TCQSM BLOS | PLOS

TRANSYT-7F

CORSIM

(Generalized Planning)

(Preliminary Engineering)

(Simple Operational Analysis)

(Microsimulation)

Effort/Complexity

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Generalized Service Volume Tables…

…allow analysts to quickly and easily compare volumes to estimate LOS.

…provide estimates of maximum service volumes for various types of Florida road facilities

…represent average roadway conditions for the state, not representative of any single roadway

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Types of Tables

Peak Hour Peak Direction

Urbanized Transitioning/Urban Rural

Peak Hour Two-Way

Urbanized Transitioning/Urban Rural

Daily Two-Way

Urbanized Transitioning/Urban Rural

(However, all are based on a peak hour peak direction analysis)

(mostly used in planning)

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Service Volume Tables In General

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Potential Applications

Quick estimate of LOS

Is there a problem?

System adequacy

Travel demand models

Roadway quick sizing

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Table Exercise 1

• Determine the maximum service volumes – In terms of annual average

daily traffic (AADT) volume– In an urbanized area– For a freeway with: • 6 lanes

LOS=C

LOS=E

95,400

122,700

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Capacity/LOS Analyses and Evaluation Tools

Pote

ntial

Acc

urac

y

Generalized Tables

ARTPLAN FREEPLAN HIGHPLAN

HCM | TCQSM BLOS | PLOS

TRANSYT-7F

CORSIM

(Generalized Planning)

(Preliminary Engineering)

(Simple Operational Analysis)

(Microsimulation)

Effort/Complexity

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Demonstration Of LOSPLAN

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LOS Planning/Preliminary Engineering Toolswill be updated in 2012

www.dot.state.fl.us/planning/systems/sm/los/

2012

Highway Capacity Manual Transition

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Implementing the 2010 HCM How Long Will It Take

Presentation Purposes

Highway Capacity ManualPast, Present & Future

Adopting the 2010 HCMWhat Has To Change

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2010:Integrated

Multimodal Perspective

HCM/LOS History

1965: LOS Concept

1985:Refined

LOS Direction

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2010 Highway Capacity Manual

2010 HCM

To be published this month

Replaces 2000 HCM

Significant changes

New arterial performance

measure

Multimodal

When to phase in?

Receiving implementation

inquiries

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Why Not Transition

Immediately?

Need for State-wide Consistent

Response to Phasing in of 2010 HCM

Rules

Policies

Procedures

Arterials

Freeways

“Standard K” Factors

Rule Update

2010 HCM Implementation Issues

ConsistencyImpactsTechnicalLOS

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What is “Standard K”?

Rather than having “K” be a traffic variable, make it a fixed parameter based on:

Area Type Facility Type

“K” Factor: Ratio of peak hour traffic to AADT

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Importance of LOS Standards and K Factor

• Time and cost savings to FDOT• Update to latest research

Promotes Better Transportation

• Within Department• Throughout development community• Simple to understand

Consistency: Planning Through

Design

• Positive for Development• Supportive of Growth Management Sensible Approach

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2 Arterial Classes

1 2

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Implementation Schedule

Refine HCM Analyses

Implement “Standard K” Factors

Update LOS Standards

Update Procedures & Guidelines

Coordination, Transition & Adoption

July ‘11 January ‘12 July ‘12 December ‘12

QUESTIONS?

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FDOT’s transition plan to the 2010 HCM represents a logical comprehensive process which includes evaluating a few key 2010 HCM changes, possibly implementing technical changes to current practice, possibly updating its level of service standards, and updating its own HCM-based software. FDOT recognizes it cannot require this transition period be applied to outside entities; however, it requests those entities accept this relatively short transition period.