WVDOT TRAVEL DEMAND MODELING & TRAFFIC DATA...
Transcript of WVDOT TRAVEL DEMAND MODELING & TRAFFIC DATA...
WVDOT TRAVEL DEMAND MODELING &
TRAFFIC DATA HANDBOOKS
Presented by:
Gehan Elsayed, PhD, P.E., Planning Division, WVDOH
John (Jay) Evans, P.E., AICP; Cambridge Systematics, Inc.
WVDOT/FHWA/MPO 2017 Planning Conference
Objectives
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Travel Demand Modeling Handbook
➢ Guidelines for developing, validating, and applying
travel demand models
➢ Resource for public agency staff (MPOs) and
consultants
➢ Clarify expectations and requirements
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Traffic Data Collection, Processing and Analysis
Handbook
“To develop a Traffic Data Collection, Processing and Analysis Handbook to support the traffic monitoring program responsibilities of the WVDOT”
1. Review current processes
2. Recommend and implement improvements
3. Document revised processes – Traffic Data Handbook
4. Document recommendations for further improvement –Data Business Plan
Objectives
Traffic Data Collection, Processing and Analysis
Handbook
Outline
1. Project Team
2. Project Scope
3. Traffic Data Collection Handbook Contents
4. Additional Tasks
5. Recommendations
6. Next Steps
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Project Team
WVDOT Traffic Modeling & Analysis Unit (TM&A)
Gehan Elsayed,WVDOT Project Manager
TM&A staff
Cambridge Systematics, Inc.
Barbara Sloan, Principal in Charge
Anita Vandervalk, Project Manager
Kim Hajek, Transportation Analyst
Digital Traffic Systems
Liz Stolz
Peter Keen
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Scope
Task 1Existing Traffic Processes
Task 2 Traffic Data Requirements
Task 3Gaps in Traffic processes
Task 4Recommendations
Task 5 Traffic Data Business Plan
Task 6Traffic Data Collection, Processing, and Analysis Handbook
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➢Volume (AADT, VMT,
etc.)
➢Vehicle Classification
(motorcycles, passenger
cars, buses, trucks, etc.)
➢Weight (Weigh-in-Motion
(WIM))
➢Speed
WVDOT Traffic Modeling & Analysis (TM&A) Unit responsible for
collection, analysis, and reporting of traffic data for Continuous Count
(formerly Permanent) and Short-Duration (formerly Coverage Count)
stations
Task 1: Existing Traffic Processes
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• Volume
• Continuous counts (73 locations statewide (2016))
• 2500 Short Duration counts annually
• Vehicle Classification
• Motorcycles
• Passenger Cars
• Buses
• Trucks
• Weight
• Trucks
• Speed
Task 1: Existing Traffic Processes
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Traffic Data uses (State):
• Engineering Design (pavement, geometric)
• Construction
• Safety Projects
• Capacity Analysis
• Truck route planning
• Traffic Forecasting
• Traffic flow maps
• Continuous Count Station (formerly
PATR) Maps
• Performance-based Planning
• Project Identification & Prioritization
• Asset Management
Task 1: Existing Traffic Processes
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• Traffic Data uses (Federal) and Guidelines:
• Highway Performance Monitoring System (HPMS) (AADT, annual vehicle miles traveled (VMT))
• Traffic Monitoring Guide (TMG)
• AASHTO Guidelines for Traffic Data programs
• Traffic Volume Trends (TVT) Report
• Pavement deterioration models
• Economic and freight research & planning
Task 1: Existing Traffic Processes
Task 1: Existing Traffic Processes
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Documentation and evaluation of WVDOT’s existing Traffic Monitoring Program
Task 2- Traffic Data Requirements
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Documentation of traffic data collection, analysis, and federal and
state reporting requirements
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To determine and document gaps in the traffic data
collection and reporting processes at WVDOT that must
be addressed to comply with federal and state
guidelines and requirements
Task 2- Gaps in Traffic Processes
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Gaps in Traffic Processes - Collection
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Gaps in Traffic Processes - Collection
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Gaps in Traffic Processes - Collection
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Gaps in Traffic Processing - Processing
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Gaps in Traffic Processing - Processing
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Gaps in Traffic Processing - Processing
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Gaps in Traffic Processes – Analysis/Reporting
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Gaps in Traffic Processes – Analysis/Reporting
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Gaps in Traffic Processes - Technology
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Gaps in Traffic Processes - Other
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Task 4- Recommendations
To compile a comprehensive set of recommendations for
addressing needs and gaps in the traffic data collection,
processing, analysis, and reporting procedures used at
WVDOT
Provides documented vision and mission statements for the Traffic
Monitoring Program
Documents roles and responsibilities of staff who support the Traffic
Monitoring Program, including data stewards, business data owners,
and the community of interest (the group of stakeholder who have an
interest in the business uses of traffic data)
Documents new and improved business processes that include the
use of capabilities of the Traffic Server (application and database) not
previously used to support the Traffic Monitoring Program
Identifies and documents available sources of training for staff
responsible for supporting the Traffic Monitoring Program
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Task 5- Traffic Data Business Plan
To develop a Traffic Data Business Plan for implementing
recommendations outlined in Task 4
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➢ Use guidance from NCHRP 8-70 (NCHRP Report 666)
Target-Setting Methods and Data Management to Support
Performance-Based Resource Allocation by Transportation
Agencies
➢ NCHRP 8-70 - best practices from other state DOTs
• Data Management
• Data Business Planning
• Data Governance
• Performance-Management
Develop Action Plan to implement recommendations
from Task 4
Task 5- Traffic Data Business Plan
Task 6- WVDOT Traffic Data Collection Handbook
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Chapter 1 – Introduction, Federal Requirements and State
Guidelines, Terminology
Chapter 2 – WVDOT Traffic Monitoring Program Overview
Chapter 3 – Continuous Count Program (formerly Permanent
Program); Equipment Installation/Evaluation, Data Collection,
Processing (QA/QC), Reporting (including TMAS)
Chapter 4 – Short-Duration Program (formerly Coverage Count
or Short-Term Program); Data Collection, Processing (QA/QC),
Reporting
Chapter 5 – Special Counts Program
Chapter 6 – Annual Process; Update RI-Log, Develop Factor
Groups, Develop and Apply Factors, Calculations, Maintain
LRS/Segmentation Process, Reporting
Chapter 7 – Highway Performance Monitoring System
(HPMS) Traffic Data
Chapter 8 – Long-Term Pavement Performance (LTPP)
Program Traffic Data
Chapter 9 – Traffic Forecast Data
Appendices (Acronyms, WVDOT CCS Sites, Continuous Count
Program QC Rules, List of Benchmarks, CRTS System, Traffic
Server, References)
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Task 6-WVDOT Traffic Data Collection Handbook
Chapter 1 - Federal Requirements
Apportionment, performance management, and freight management
Mandate for the traffic monitoring program. It requires State highway departments to
furnish information deemed desirable in administering the Federal-aid highway
program.
Traffic monitoring system for highways
Rule making for preserving and protecting highways & Insuring safety of traffic
Measuring performance of surface transportation system
Management and Monitoring Systems – Traffic Monitoring System (TMS)
State DOTs must provide data that supports FHWA’s responsibilities to Congress and
the public
State’s Traffic Management System (TMS) precision of reported data shall meet the
statistical precisions established by FHWA for the HPMS.
State Public Road Mileage. Each state must annually submit a certificate of public
road mileage with the State to the FHWA Division Administrator.
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Statewide data collection programs
Highway Performance Monitoring System (HPMS)
Guidelines for Traffic Data Programs
The Highway Community Exchange
Book of Standards for Construction, Section Four, Construction, Road and Paving
Materials: Vehicle-Pavement Systems
Model Inventory of Roadway Elements
Data Dictionary for Traffic Data Records
Traffic Safety Performance for States and Federal Agencies
Coal Resource Transportation System (CRTS) Roads
Guidance on State Safety Data Systems
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Chapter 1 - Federal Requirements
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Chapter 1 - Federal Requirements
Chapter 1 – New Information
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Federal and State guidelines and requirements for traffic monitoring
programs
Introduction of new terminology (coincide with TMG; i.e., Continuous Count
(formerly PATR); Short-Duration (formerly Coverage))
Includes additional reference documents for guidance (TMG, AASHTO
Guidelines, HPMS Field Manual)
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Chapter 2 – Traffic Monitoring Overview
Chapter 2 – Traffic Monitoring Overview
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Chapter 2 – Traffic Monitoring Overview
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Chapter 3 – Continuous Count Program
3.1 Data Collection» Field Crew Responsibilities – New Process for Site Inspections
» Annual Cycle – New Process for Annual Cycle (review of all CCS stations)
» Daily Cycle – New Process for Daily Cycle
» Polling – New office process within Polling Procedure
» Site Selection – New Processes for Conducting Inventory of all sites; Site Selection to maintain sufficient number of sites per factor group(s); Caution noted for potential removal of WIM sites
3.2 Data Processing QA/QC
New Process for establishing CCS station in Traffic Server database, monthly checks on weight data, etc.; utilize more of QA/QC available in Traffic Server as noted in Handbook
3.3 Reporting (including TMAS)New documentation on preparing datasets for submission to FHWA via TMAS;
New process to utilize TMAS reports to validate WVDOT datasets prior to TMAS upload
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Chapter 3 – Continuous Count Program
Chapter 4 – Short Duration Program
4.1Data CollectionNew procedures recommended in data collection contracts (i.e., request Per
Vehicle Data Collection, etc.); WVDOT notification to contractors of
scheduled holidays – avoid collecting on those days
4.2 Data Processing QA/QCNew processes outlined for use of Traffic Server for QA/QC of data
4.3 Reporting
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Chapter 4 – Short Duration Program
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Count Type Road Classification How Often Duration of Count
Volume Interstate mainline
(statewide)
Once in Spring 48 hrs.
Volume Interstate ramps
(statewide)
Once/yr. 48 hrs.
Volume Other than Interstate
(1/3 of state)
Once/yr. 48 hrs.
Vehicle
Classification
Interstate mainline Once in Fall 48 hrs.
Vehicle
classification
Other than Interstate
(1/3 of state)
Once/yr. 48 hrs.
Turning
Movement
Project-based Ad-hoc Machine – 24 hrs.
Manual - approx. 9
hrs. (always
daylight hrs.,
covering a.m. and
p.m. peaks)
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Chapter 4 – Short Duration Program
Chapter 4 – Short Duration Program – Count Cycle
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Chapter 4 – Short Duration Program – Count Cycle
NOTE: Conducting Interstate Short Duration counts for Volume data once/year
and for Classification data once/year each at different times of the year allows
the Traffic Monitoring Program staff sufficient time to process the large
amounts of data in a timely manner. This process includes but is not limited to
the following tasks:
» Determine if any recounts are needed for missing or error data and direct
contractors to conduct recounts
» Perform QA/QC on data in timely manner for payment to contractors
» Ensure data is available for engineering design work at WVDOT
» Ensure that data is available no later than October 31st of each year for use in
Annual Processing and federal reporting
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Chapter 5 – Special Count Program
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Chapter 6 – Annual Process
6.1 Annual Process Overview
6.2 Update RI Log
6.3 Develop Factor Groups
6.4 Develop and Apply Factors
New information on computing/applying growth factors using Traffic Server instead of
previous outdated methods
6.5 Maintain LRS/Segmentation Process
This entire section is new guidance on how to maintain the LRS/Segmentation
process
6.6 Reporting
New guidance on rules of release of traffic data to the public
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Chapter 7 – Highway Performance Monitoring System
(HPMS) Traffic Data
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Chapter 7 – HPMS Datasets – New Information
NOTE: New guidance is provided on how to produce Future Year AADT for
reporting in HPMS based on use of Forecast data derived from methods
described in Chapter 9
New Process – Close coordination between GTI Section and Traffic Monitoring
Program Section for development/processing/review of HPMS datasets prior to
HPMS submittal
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Chapter 8 – Long Term Pavement Performance
(LTPP) Program Traffic Data
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This chapter describes NEW processes for producing traffic forecast data to
replace previous methods of applying a percent (%) growth (outdated
procedure)
Use forecasts produced by a TDM
Use other forecasts previously developed by WVDOT or local highway
agencies for highway planning purposes
Use area-specific forecasts of the average percentage change in AADT
derived from forecasts developed using the above procedures or
Derive forecast changes in AADT from forecast changes in population and
employment developed by the Bureau of Business & Economic Research of
West Virginia University
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Chapter 9 – Traffic Forecast Data
Inventory and Site Assessment
Task 1 – Continuous Count Station (CCS) (formerly PATR) Equipment
Evaluation
» Review the Continuous Count Station (CCS) sites
–Determine what type of new equipment (or equipment upgrades)
may be needed
–QA/QC of the hardware/software so that this information can be
documented in the Handbook
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Scope- Additional Tasks
Task 2 – Documentation of Process for Continuous Count Station (CCS
(formerly PATR)) Installation and Maintenance
» Research and document the process of installing and maintaining the CCS equipment
– All steps of work currently carried out by current WVDOT employees
» Make recommendations on which work could be contracted out and what would need to
be included in a contract scope of work for installing and maintaining CCS equipment
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Inventory and Site Assessment
Scope- Additional Tasks
Task 3 – Additions to Traffic Data Collection Handbook
» Procedures for review and evaluation (on-going basis) of CCS (formerly PATR) and
Short-Duration (formerly Coverage Count) sites to ensure operability of equipment and
functionality within 2 weeks if any sites are down
» Procedures for WVDOT to conduct annual review of CCS and Short-Duration sites
statewide to ensure there is sufficient coverage within Factor Groups recommended in
the TMG
» Equipment installation procedures
» QA/QC procedures to ensure that hardware/software at the CCS site is working
properly
» Responsibilities of WVDOT Field staff in monitoring polling functionality of equipment
on a daily basks
» Responsibilities of WVDOT Office staff in monitoring polling functionality of equipment
on a weekly basis
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Inventory and Site Assessment
Scope- Additional Tasks
Recommendations - Immediate
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Request Per Vehicle data from traffic data collection
contractors
Short Duration
Perform the QA/QC checks documented in the TDH for volume
and vehicle classification data collected by short-duration
counters
Short Duration
Do not perform short-duration counts during holidays or days
preceding or following holidays when traffic might be
unusually high or low
Short Duration
Ensure that all stations are assigned a functional class per the
FHWA FC schema
Annual Process
Maintain the LRS/Segmentation process in accordance with
procedures described in the TDH
Annual Process
Determine rules of release of traffic data Annual Process
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Implement Grounding Test Procedures and BusinessProcesses
Equipment
Installation Process
Recommendations
Implement Proper Installation of Grounding RodsEquipment
Installation Process
Recommendations
Follow the instructions for this program as described inChapter 5 of the TDH
Special Counts Program
Ensure that CCSs are operational within a two-week periodafter outages are reported
PreventativeMaintenance
Perform series of QA/QC checks on data in Traffic Server on adaily and monthly basis
PreventativeMaintenance
Use the reports available in the TMAS system to performQA/QC checks on traffic data prior to submission of the datain TMAS
PreventativeMaintenance
Training for TM&A staff On-going or One-time Practice
Recommendations - Immediate
Recommendations – 3 Months
Review HPMS data sets containing traffic data prior toHPMS submittal
Annual Processes
Coordination with GTI Section regarding HPMS Annual Processes
TM&A staff to provide AADT values by RoadwayFunctional Classification to the GTI Section
Annual Processes
TM&A staff consider use of Traffic Server to calculateVMT for Local Roads
Annual Processes
Use traffic forecast data to develop Future Year AADT (20yr)
Traffic Forecasting Processes
Alternatives for developing AADT forecasts for trafficsegments
Traffic Forecasting Processes
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Recommendations – 6 Months
Report classification and weight data to LTPP
program contractor (First set of WVDOT LTPP data
submitted January 2017)
Annual Processes
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Recommendations - One Year
Implement a Site Selection Business Process Site Selection Processes
Develop and Archive Site Evaluation Records Business
ProcessSite Selection Processes
Develop an Annual Factor Group Development Business
Process
Factor Group
Develop a CCS Validation Business Process Factor Group
Allocate WIM Paving Funds to Other Program Needs Financial
Performance measures for the Traffic Monitoring Program On-going or One-time Practice
Annual review of station record fields in Traffic Server On-going or One-time Practice
Annual review and update of the Traffic Data Handbook and
Traffic Data Business Plan
On-going or One-time Practice
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Recommendations - One Year
Transition Field Crew to role of inspectors of contractors’
work
One-time Practice
Purchase two vans to increase productivity of inspectors One-time Practice
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Recommendations – 2 Years
Managing Class Factors On-going or One-time Practice
ITS Coordination Develop an ITS
Communication and
Coordination Business Process
ITS Coordination Develop a Documented
ITS and Traffic
Monitoring Program Coordination Project
Preventative Maintenance Implement a
comprehensive
preventative maintenance program
Reduce number of WIM sites by 2/3 WIM
Consider procurement of alternative equipment (i.e., Peek,
TDC, Diamond, Black Cat) at lower cost
WIM
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Recommendations – 2 Years
Allocate WIM Site funding to other program needs WIM
Use of load spectra data in weight factoring Load Spectra
Manage CCS as part of a comprehensive asset
management program
Other
Impact of migration to ERP Other
Executive summary reports Other
Develop website for public Other
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Recommended Next Steps
1. Adopt Handbook and DBP (Implementation Plan)
2. Start Implementation Project
» Proceed with recommendations by timeframe
» Bring all CCS sites up to highest quality standards
» Develop/Implement a WIM Site Selection Methodology
» Implement some co-location of ITS sites
3. At end of Year 2 – Evaluate for further privatization
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Thank You!