traffic analysis toolbox & highway capacity manual transition tyrone scorsone fdot systems...
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Traffic Analysis Toolbox &Highway Capacity Manual Transition
Tyrone ScorsoneFDOT Systems Planning
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Transportation Research Board’s (TRB) Highway Capacity Manual (HCM)
3
HCM Quality/Level of Service (QLOS) Handbook
Facility Level Analysis Detailed Point & Segment Analysis
4
Advantages of Analytical/Deterministic Tools
Quickly predict impacts
Widely accepte
d
5
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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7
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
20
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.