FHWA R dW th FHWA Road Weather Management Program Overview and Update Roemer M. Alfelor Roemer M. Alfelor Off fO Off fO Office of Operations Office of Operations Federal Highway Administration Federal Highway Administration I-80 Corridor Coalition Meeting 80 Corridor Coalition Meeting January 26, 2010 January 26, 2010 1
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FHWA R d W thFHWA Road Weather Management Program · Maintenance Decision Support System MDSS is a winter maintenance decision-support system that combines: • Advanced weather prediction
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FHWA R d W thFHWA Road Weather Management Program
Overview and Update
Roemer M. AlfelorRoemer M. AlfelorOff f OOff f OOffice of OperationsOffice of Operations
Federal Highway AdministrationFederal Highway Administration
• Day-to-day operations to manage the system y y p g yunder all types of weather– “Anytime, anywhere road weather information” is
h ’ the program’s mission– This includes current and predicted information
about weather’s affect on roadsabout weather s affect on roads…– … and the decision support tools to aid road users
and operators to make effective decisions, e.g.,• When to pre-treat roads for snow & ice control• When to post traveler advisories (fog, floods, rain, snow,
etc.)
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Weather Impacts on Transp. System• Safety
– Approx 1.6M weather-related crashes, 673K injuries 7K fatalities per yearinjuries, 7K fatalities per year
• Mobility– About 25% of non-recurring delays on About 25% of non recurring delays on
freeways is due to weather– Congestion costs about $9.5B/yr. for 85
urban areasurban areas• Productivity
– Weather-related delays add about y$3.4B/yr. to freight costs
• EnvironmentCh i l d f i i i ff
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– Chemicals used for anti-icing affect watersheds, air quality and infrastructure
RWM Program HighlightsRWM Program Highlights
• The Clarus InitiativeThe Clarus Initiative• IntelliDriveSM & Weather
MDSS• MDSS• Weather Responsive Traffic Management• ITS Strategic Plan
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What is the Clarus Initiative?What is the Clarus Initiative?
• A database management system for all surface g ytransportation weather observations in North America
• One database removes borders• Provides advanced quality checking for both
atmospheric & pavement data• Includes extensive metadata• Easy access via web portal & subscription• Once development completed, transfer to
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NOAA for operations
Clarus Development Milestones
Regional Demo Phase1 QCh Algorithm Development
2004 2005 2006 2007 2008 2009 2010 2011
Regional Demo Phase 2Regional Demo Phase1 QCh Algorithm Development
Regional Demo Phase 3
2004 2005 2006 2007 2008 2009 2010 2011
6ConOps Design PoCMulti-state Regional Demo
Transition to NOAA
Clarus System Data FlowsClarus System Data FlowsEnvironment Canada
RWIN Server
State DOTRWIS S
State DOTGPS/AVL
State DOTRWIS Server
RWIS Server
State DOT
VII Probe-Based Data
CollectorServices
QualityChecking
7 DayData Cache
RWIS Server
•ObservationsM dChecking
WebPortal
MetadataCache
The Clarus System
•Metadata•Quality Flags
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Nationwide Data Management System forSurface Transportation Environmental & Pavement Condition Observations
Participation Status for ClarusClarus
as of July 31, 2009
Canadian RWINParticipation
Local DOT ParticipationCity of Indianapolis INCity of Indianapolis, INMcHenry County, ILCity of Oklahoma City, OK NY State ThruwayCity of Denver CO
Connected(32 States 3 Locals
Clarus Connection Status
City of Denver, COWashington, DC
Sensor & Station Co ntPending(4 States 2 Locals)
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(32 States, 3 Locals,3 Provinces)
Partially (2 States)
Sensor & Station Count1,897 Sensor Stations (ESS)42,149 Individual Sensors
Clarus Regional Demonstration5 Use Case Scenarios5 Use Case Sce a os
1. Enhanced Road Weather Forecasting Enabled by Clarus2. Seasonal Weight Restriction Decision Support Tool2. Seasonal Weight Restriction Decision Support Tool3. Non-winter Maintenance & Operations Decision Support Tool4. Multi-state Control Strategy Tool5. Enhanced Road Weather Content for Traveler Advisories
State Transportation Agency Partners
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What is IntelliDriveSM?What is IntelliDrive ?
• IntelliDriveSM is a suite of technologies and gapplications that use wireless communications to provide connectivity:– With and between vehicles– Between vehicles and roadway infrastructure
B t hi l i f t t d i l – Between vehicles, infrastructure and wireless consumer devices . . .
In order to achieve strategic goals in Mobility, Safety,and Convenience.
• To determine the value of vehicle probe data i i i d th iin improving road weather services– Can vehicle-based data tell us the road weather conditions?– Is the probe data of sufficient quality?
Wh h i i # f l d i i li – What are the minimum # of samples and minimum sampling period per road segment to get valid results?
• To develop a Vehicle Data Translator (VDT)• To develop a Vehicle Data Translator (VDT)– Parse and filter probe data– QC probe data
Initial Focus of Weather ResearchInitial Focus of Weather Research
• Air temperatureAir temperature• Barometric pressure
Precipitation occurrence (yes no)• Precipitation occurrence (yes, no)• Precipitation intensity (none to heavy)• Precipitation type (liquid, frozen)• Pavement condition (slippery yes/no)( pp y y )• Fog (likely, not likely)
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Maintenance Decision Support System
MDSS is a winter maintenance decision-supportsystem that combines:• Advanced weather prediction• Advanced road condition prediction• Rules of practice for anti-icing and de-icing
The system generates winter treatmentrecommendations on a route-by-route basis.
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MDSS: OverviewMDSS: Overview
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MDSS ParticipationSt t DOT P ti i ti i State DOT Participation in
Maintenance Decision Support System (MDSS)2000-2009
US & Intl Stakeholders who participated in Annual MeetingsOntario Ministry of Transportation City & County of Denver CO.Environment Canada New York State Thruway Authority
f d d h
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City of Grand Prairie Texas Austrian Road AuthorityDallas Area Rapid Transit E-470 Highway Authority ColoradoCity of Virginia Beach DPW McHenry Cnty IL, Division of Transportation
MDSS UpdatesMDSS Updates
• Switched road temperature forecast Switched road temperature forecast model to METRo (Model of the Environment and Temperature of Roads)Environment and Temperature of Roads)
• Integrated support for fixed & mobile camera imagerycamera imagery
• New alerting system for near term road weather hazardsweather hazards
––monetary only from crew costsmonetary only from crew costsmaterials not includedmaterials not included––materials not includedmaterials not included
––LOS benefits, harder to quantifyLOS benefits, harder to quantify
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Weather Responsive Traffic Managementp g
• Goals: Develop strategies and tools to help i ff ti l t ffi d agencies effectively manage traffic and
highway operations during inclement weather.
• WRTM Strategies:– Advisory– Control– Treatment
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WRTM ActivitiesWRTM Activities
• Integration of Weather in TMC/TOCIntegration of Weather in TMC/TOC
• Weather and Traffic Flow Studies
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Weather Integration in TMC/TOCWeather Integration in TMC/TOC• Objectives:
– Document existing practices needs opportunities and Document existing practices, needs, opportunities and challenges associated with TMC weather integration
– Assist TMC’s with their weather integration activities
• Progress to Date:
– Completed a State of the Practice Study on TMC Weather Integration(2006)g ( )
– Developed a Weather Integration Self-Evaluation and Planning Guide (2008)
M l d El t i V i• Manual and Electronic Versions
• Downloadable from FHWA Website
– Worked with 2 TMC’s (Sacramento and Milwaukee) in
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Worked with 2 TMC s (Sacramento and Milwaukee) in evaluating the guide and developing Wx integration plan.
– Currently working with 6 TMC’s
Major Elements of the GuideMajor Elements of the Guide
• TMC team evaluates their needs and opportunities for h d th i t tienhanced weather integration
– Identify weather conditions
U d t d th i t– Understand weather impacts
– Identify TMC needs for weather information
An electronic ersion of the G ide sorts thro gh the • An electronic version of the Guide sorts through the information provided by the TMC and identifies potential integration strategies
• TMC develops a practical weather integration plan to implement those strategies
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Next Steps Next Steps
• Working with the Sacramento RTMC to gimplement their plan
• Working with 6 TMC’s to conduct self-• Working with 6 TMC s to conduct selfevaluation and develop integration plans
A l d tif h i – Analyze and quantify how various weather events impact traffic flow (macro & micro levels)(macro & micro levels)
– Improve existing knowledge and practices on managing traffic flow under practices on managing traffic flow under adverse weather conditions
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Empirical Study on Weather & Traffic
• Develop weather-sensitive traffic flow pmodels using empirical weather and traffic data
• Progress to date:– Completed and published in 2007p p– Developed capacity and speed adjustment
factors for rain and snow– Final report available from FHWA website
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Microscopic Analysis of Weather and T ffiTraffic• Analyze car following, lane changing and gap
t b h i d i i l t th d acceptance behavior during inclement weather, and develop models to incorporate in existing micro-simulation tools
• Progress to Date:– Final Report for Phase 1 completed and available from FHWA
website– Car following – developed models (snow), calibrated on
arterial– Gap Acceptance – developed models for intersection (rain)– Lane Changing – theoretical model exists, no data for
calibration– Follow-on work to develop new models and validate existing
ones
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ones
Incorporating Weather Impacts in T EPSTrEPS
• Traffic Estimation and Prediction Systems • Traffic Estimation and Prediction Systems (TrEPS)
• Update existing dynamic traffic assignment d l ( l ti & ff li ) t t f models (real-time & off-line) to account for
weather effects• Progress to Date:Progress to Date:
– Completed and published on FHWA website– Literature on traffic response to weather and Wx
responsive traffic management strategiesresponsive traffic management strategies– Review of DynaSMART and DynaMIT models -
parameters that can be adjusted for weatherIncorporated weather impacts in DynaSMART P
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– Incorporated weather impacts in DynaSMART-P
Human Factors Analysis of Weather Advisory and Control InformationAdvisory and Control Information
• Review, evaluate and recommend strategies , gfor improving existing road weather messages and dissemination methods
• Progress to Date:– Identified traveler requirements for Wx
i f ti d i d t tiinformation and reviewed current practices– Reviewed and proposed methodology for
evaluating the effectiveness of Wx information evaluating the effectiveness of Wx information and dissemination methods
– Developed research plan, including framework for d th d i t l
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road weather message design tool– Development of design tool in progress
Other WRTM Activities
Data Mining and Gap Analysis for WRTM1. Conduct a comprehensive search, analysis and 1. Conduct a comprehensive search, analysis and
documentation of data that exists for traffic and weather analysis
2. Collect additional field data to develop traffic models
Developments in WRTM Strategies
p
1 Update state of practice review on WRTM strategies 1. Update state-of-practice review on WRTM strategies
2. Identify potential improvements in WRTM strategies using recent knowledge/models/information (e.g., signal control advisory messages ramp metering )control, advisory messages, ramp metering, …)
3. Conduct field testing and evaluation of advanced WRTM strategies
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Weather Module for the Traffic Analysis Tool (TAT) Program
ITS Strategic PlanITS Strategic PlanITS Strategic Plan – Road Weather Management
Purpose Research Questions:?To facilitate and improve the value of road
weather information provided by both public and private sector weather communities to all transportation users and operators through robust data assimilation, quality
What vehicle-based data is available?What is the data quality & validity?How can vehicle-based data be integrated with existing weather & road-weather data?
checking and effective dissemination Objective
Applications for public sector managers and more robust data for the weather enterprise Note:
Road Weather Management is an earmark
What public sector applications are needed and what are their benefits?
Headline gin current legislation. It will be incorporated into Dynamic Mobility Applications for future work.
2010 2011 2012 2013Fiscal Year
HeadlineCombining vehicle-based, road-weather and weather data to improve safety and mobility
Approach
2010 2011 2012 2013Fiscal Year
Data Capture Data Analysis and Integration
ApplicationDevelopment
DemonstrationsEvaluations
Real-Time Data Demonstrations
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Incorporate Into Dynamic Mobility Apps
Dynamic Mobility Apps Demonstrations
FY 2010 investment up to $4,600,000
Contact Info:Contact Info:
Roemer AlfelorRoemer AlfelorFHWA Office of Operations(202) [email protected]