evaluation tools to support its planning process fdot research #bd015-19 presented to model...
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![Page 1: Evaluation Tools to Support ITS Planning Process FDOT Research #BD015-19 presented to Model Advancement Committee presented by Mohammed Hadi, Ph.D., PE](https://reader035.vdocuments.net/reader035/viewer/2022062714/56649d415503460f94a1c5ce/html5/thumbnails/1.jpg)
Evaluation Tools to Support ITS Planning Process
FDOT Research #BD015-19
presented to
Model Advancement Committee
presented by
Mohammed Hadi, Ph.D., PE
November 24, 2008
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IDAS Limitations
Evaluate a large number of ITS deployments. However:
• Not consistent with the Florida calibrated models
• Requires manipulation of FSUTMS output files for use as inputs to the tool
• Software design and interfaces using 1990s software technologies
• Methods and some parameters selected in the 1990s
• Not flexible to allow evaluating new ITS elements and components, performance measures, etc.
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FDOT Project
Develop a tool and methods to perform ITS sketch planning evaluations as part of the FSUTMS/Cube environment
• No need for file conversion
• Use calibrated regional models
• Flexible and extendable evaluation environment
• Up to date methods and parameters
• Powerful data handling and modeling capabilities. State-of-the-art user interface of Cube
The project is a joint effort of the FDOT System Planning Office and the FDOT ITS Section
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Evaluated ITS Deployment (1)
Ramp Metering
Incident Management Systems
Highway Advisory Radio (HAR) and Dynamic Message Signs (DMS)
Advanced Travel Information Systems
Managed Lanes
Signal Control
Transit Vehicle Signal Priority
Emergency Vehicle Signal Priority
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Evaluated ITS Deployment (2)
Monitoring and Management of Fixed Route Transit
Transit Information Systems
Transit Security Systems
Transit Electronic Payment Systems
Smart Work Zones
Road Weather Information Systems
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Evaluation Tool
EvaluateITS
Benefits and Costs
Benefit Dollar Values
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Assessment Elements
Performance modules (emission, fuel consumption, safety, TT)
ITS impacts
ITS costs
Dollar values of benefits
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Benefit Evaluation Methods
A method developed for each component• Review and assessment of methods used in evaluation tools
• Review of literature
Default ITS impact parameters derived based on a review of previous evaluation studies, US DOT JPO benefit database and the values used in existing ITS sketch planning tools.
The user will be able to change the default ITS impact parameters and perform sensitivity analysis.
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Model Input
ITS Component
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Model Input for Incident Management (1)
Alternative Information
Alternative letter Modeling year Working directory
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Model Input for Incident Management (2)
Parameters from Demand Model
Auto occupancy Percentage of truck
trips in Truck_Taxi trips
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Model Input for Incident Management (3)
Input for ITS Applications
Analysis periods, days, and volume factor for each period
Type of incident management (Six combinations for incident management with or without DMS and HAR)
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Model Input for Incident Management (4)
Input for ITS Applications (Con’t)
Information type provided by DMS and HAR
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Model Input for Incident Management (4)
Deployment Location Indicate the links within the
coverage of incident management by adding one new attribute “IM” and assign the value of 1 to this attribute
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Model Input for Incident Management (5)
Analysis parameters
Incident information: frequency, duration, capacity reduction
Accident rate Truck type and fuel
consumption rate Vehicle class percentage
and emission rate for CO, HC, and NOx
Notes: Default values are provided, however, user can modify it based on local conditions.
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Model Input
Impact factors
Diversion rate due to DMS and HAR
Fatality reduction rate and crash reduction rate
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Model Input
Impact factors (Con’t)
Average trip length on the mainline and on the alternative route
Percentage of diverted vehicles using freeway
Road ranger service patrol activities and costs
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Model Input
Dollar Value
Dollar value of time Accident costs Fuel costs Emission costs
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Model Input
Equipment and Costs
Discount rate
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Model Input
Equipment and Costs (Con’t)
Equipment and unit costs for incident management, DMS, and HAR
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Modeling Procedure Example
Deployment Performance measures and
benefits Costs Benefit/Cost ratio
Overall Structure for Incident Management
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Add one new attribute to each link to indicate the type of incident management
Deployment
Modeling Procedure
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Initialize the output files Calculate the incident delay
and time savings Calculate reduction in
accident number and costs Calculate fuel savings
Performance Measures and Benefits
Modeling Procedure
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Performance Measures and Benefits (Con’t)
Modeling Procedure
Calculate the emission reductions
Calculate the monetary benefits of road ranger service patrol
Output the performance and summary of benefits
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Calculate the total number of study periods
Set all the initial values to be zero
Initialization
Performance Measures and Benefits
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Travel Time
Loop over all the analysis periods
Calculate the traffic volume during the study period
Prepare the calculation of travel time on alternative route
Calculate incident delay and total time savings
Save the performance and benefits for each analysis period
Performance Measures and Benefits
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Safety
Loop over all the analysis periods
Calculate number of fatalities, injuries, PDO
Calculate accident costs Save the performance and
benefits for each analysis
period
Performance Measures and Benefits
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Fuel Consumption
Loop over all the analysis periods
Calculate vehicle miles in queue and fuel consumption in queue
Calculate fuel savings Save the performance and
benefits for each analysis period
Performance Measures and Benefits
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Emissions
Loop over all the analysis periods
Calculate emissions of CO, HC, NOx due to the queues
Calculate emission reductions
Save the performance and benefits for each analysis period
Performance Measures and Benefits