Title: National Transportation Operations Coalition: Work Zone Traffic Analysis Strategies Webinar
1National Transportation Operations
CoalitionWork Zone Traffic Analysis
StrategiesWebinar
- FHWA
- Daniel Grate
- Noblis
- Dr. Karl Wunderlich
- Matthew Hardy
- 9 July 2008
2Overview
- Introduction Welcome
- Topic 1 Perspectives on Work Zone Traffic
Analysis Strategies - Topic 2 Decision-Making Process and Work Zone
Traffic Analysis - Topic 3 Issues in Work Zone Traffic Analysis
- Conclusions
3Topic 1Perspectives on Work Zone Traffic
Analysis Strategies
4Goal Key Messages
- Goal
- Develop guidance for state and local DOTs on the
effective use of traffic analysis tools to assist
in the planning, design and operation of work
zones - Key Messages
- No single correct tool for all work zone
analyses - Effective work zone analysis and tool selection
depends on - schedule and resource constraints
- data availability and quality
- work zone characteristics
- decisions that need to be supported
5Products
- Traffic Analysis Tools Volume VIIIA Guide for
Decision-Makers - Traffic Analysis Tools Volume IXA Guide for
Analysts - Case Studies are a critical component
- Project Applications
- Strategic Modeling Approaches
6Case StudiesProject Applications
- Woodrow Wilson Bridge
- Lane Closure Analysis (WWB-LCA)
- Roadway Operations Analysis (WWB-ROA)
- Roadway Closure Analysis (WWB-RCA)
- California I-15 Pavement Reconstruction (CA
I-15) - Nova Scotia, Canada Reeves Street (NS-Reeves)
- Glacier National Park Going to the Sun Road
Rehabilitation Project (GNP) - Zion National Park Entrance Booth Reconstruction
(ZION) - Yosemite National Park Yosemite Village Roadway
Reconstruction (YOS) - Utah I-15 Reconstruction Design-Build Evaluation
(UT I-15) - Detroit, Michigan
- Ambassador Gateway Bridge MOTSIM (MI AMB)
- I-94 Rehab MOTSIM (MI I-94)
- I-75 Trade Corridor MOTSIM (MI I-75)
7Case StudiesStrategic Modeling Approaches
- New Jersey Turnpike AuthorityLane Closure
Application - Wisconsin DOTTransportation Management Plan
Development Process - Michigan DOT Southeastern Michigan Simulation
Network (SEMSIM)
8Case Study Locations
Project Applications
KEY
Strategic ModelingApproaches
9Topic 2Decision-Making Process and Work Zone
Traffic Analysis
10Decision-Making Engine
11Decision Making in the Project Life Cycle
Work Zone Traffic AnalysisDecision-Making Process
Program Delivery Process
12Decision-Making Process
13Planning
- Initial assumptions may emerge
- Strongest connections between application and
scheduling
- Many scenarios are tested and many changes are
made
Case Study Example Going to the Sun Road,
Glacier National Park
14PE/Design
- Stronger connection between scheduling and
application
- Scheduling and application decisions create
constraints
- Traffic control becomes more important
Case Study Example M-10 Lodge Freeway, Detroit,
Michigan
15Construction
- Application technique finalized
- Limited flexibility to change project schedule
- Traffic control plans have been developed some
adaptation may be possible due to schedule
Case Study Example Woodrow Wilson Bridge,
Northern Virginia
16Impact of Decisions
planning
pe/design
construction
modeling opportunities
data requirements
17Topic 3Issues in Work Zone Traffic Analysis
18Factors in Selecting aWork Zone Analysis Tool
- Work Zone Characteristics
- Transportation Management Plan
- Data Availability and Quality
- Agency Resources
- Performance Measures
19Work Zone Characteristics
- Type
- I Affects a a large number of traveler at the
regional scale, with high public interest,
significant user cost impacts and a long
duration. - II Similar to Type I but moderate impact.
- III Similar to Type I but low impact.
- IV Short-duration work zone with low visibility
and public interest - Configuration
- Isolated Single work zone with limited
interaction of surrounding infrastructure. - Pipe Single work zone with limited interaction
of surrounding infrastructure. - Network Connected, inter-dependent network
structure with multiple access points and
alternate routes. - Geographic Scale
- Small, Medium, Large
- Analysis Area
- Site, Local, Metropolitan
20Case Studies Project ApplicationsCharacteristic
Summary
21Transportation Management Plan
- Temporary Traffic Control
- Control Strategies
- Traffic Control Devices
- Coordination/Contracting/Innovative Construction
Strategies - CA I-15 CA4PRS Application
- Public Information
- Public Awareness Strategies
- WWB Roadway Closure Analysis
- Motorist Information Strategies
- Transportation Operations
- Demand Management Strategies
- Corridor/Network Management
- Work Zone Safety Management
- UT I-15 Work Zone Safety Analysis
- Traffic Incident Management and Enforcement
22Data Availability and Quality
23Agency Resources
- Institutional Arrangements
- Technical Staff
- Funding
- Schedule
24Performance Measures
- Travel Time
- Delay
- Queue Length
- Speed
- Volume
- User Cost
- Incidents
- Cumulative Impact
25Choosing a Modeling Approach
26Modeling Spectrum
Simple
Complex
Sketch Planning
HCM
Meso
Micro
Macro
Limited Rough Estimation Shorter Limited Lower
Comprehensive Precise Calculation Longer Required
Higher
27ComprehensiveWork Zone Analysis Methodologies
28Identifying a Modeling ApproachModeling Risk
Frontier
high
Modeling Opportunities
Resource Availability
Significant Technical Risk
low
high
Level of Detail
29Identifying a Modeling ApproachWork Zone Case
Studies
WWB
high
Detroit, MI SEMSIN
CA I-15 (operations)
WWB-ROA
UT I-15
CA I-15 (planning) WWB-RCA
Resource Availability
medium
New Jersey Turnpike LCA WWB-LCA ZION
Significant Technical Risk
low
low
high
medium
Level of Detail
30Identifying a Modeling ApproachWork Zone
Modeling Tool Selection
Microscopic (Multi-scale)
Mesoscopic (Network)
high
Microscopic
Travel DemandModel (Network)
Mesoscopic (Pipe)
Resource Availability
medium
Macroscopic (Pipe)
Significant Technical Risk
Sketch Planning HCM
low
low
high
medium
Level of Detail
31Conclusions
- Results from models serve to improve overall
understanding of forces affecting work zone
decision-making. - mobility, financial, environmental and safety
- Modeling should never be used to make key
decisions but a trusted resource identifying the
potential mobility impacts informing key
decisions. - Value of analysis is directly related to the
context for analysis and the context for
validation. - Work zone analysis extends beyond running the
model and reporting results. - Must provide decision-makers with a broader
understanding that connects the findings of the
analysis within the decision-making context.
32Available Resources
- FHWA Office of Operations, Work Zone Safety and
Mobility Program - http//www.ops.fhwa.dot.gov/wz/index.asp
- Work Zone Impacts Assessment An Approach to
Assess and Manage Work Zone Safety and Mobility
Impacts of Road Projects - http//www.ops.fhwa.dot.gov/wz/resources/final_rul
e/wzi_guide/index.htm - FHWA Traffic Analysis Toolbox (TAT)
- http//ops.fhwa.dot.gov/trafficanalysistools/index
.htm - FHWA Work Zone Mobility and Safety Program Best
Practices Guide - http//www.ops.fhwa.dot.gov/wz/practices/practices
.htm