ITS Sketch Planning Tool Webinar - PowerPoint PPT Presentation


PPT – ITS Sketch Planning Tool Webinar PowerPoint presentation | free to download - id: 5e9f0f-ODBlN


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation

ITS Sketch Planning Tool Webinar


ITS Sketch Planning Tool Webinar 2:00 4:00 PM January 8, 2009 * * * * Managing change in large-scale complex systems. Note that this includes hardware, software ... – PowerPoint PPT presentation

Number of Views:107
Avg rating:3.0/5.0
Slides: 29
Provided by: fsutmsonl


Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: ITS Sketch Planning Tool Webinar

ITS Sketch Planning Tool Webinar
  • 200 400 PM
  • January 8, 2009

Value and Impacts of ITS
  • Important element of the decision making process
  • ITS planning and programming
  • Choice between ITS and other alternatives
  • Understanding the impacts/quantifying the
  • Optimizing existing system operation and design

Evaluation Tool Purpose
  • Provides long-range assessment of the benefits
    and costs associated with implementing ITS in a
  • Allows the users to assess deployment options
    within the framework of the MPO adopted FSUTMS
  • Accumulates the benefits and costs over the
    life-cycle duration of each of the improvement
    types selected by the user
  • Allows ranking of alternative improvements

Evaluation Approaches
  • Goal-based approach
  • Does not compare expected benefit to the expected
    cost dollar values
  • Economic approach
  • Does not account for non-quantifiable measures
  • Combination of approaches

  • Powerful tool and used as a basis and a starting
    point for this development
  • Evaluate a large number of ITS deployments
  • Limitations
  • Not consistent with the Florida calibrated models
  • Requires manipulation of FSUTMS output files for
    use as inputs to the tool
  • Software design and GUI needs improvements
  • Methods and some parameters need to be updated
  • Not flexible to allow evaluating new ITS elements
    and components, performance measures, etc.

FDOT Project
  • Develop a tool and methods to perform ITS sketch
    planning evaluations as part of the FSUTMS/Cube
  • 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
  • A joint FDOT System Planning Office and FDOT ITS
    Section effort.

Evaluated ITS Deployment
  • Ramp Metering
  • Incident Management Systems
  • Highway Advisory Radio (HAR) and Dynamic Message
    Signs (DMS)
  • Advanced Travel Information Systems
  • HOT Lanes
  • Signal Control
  • Transit Vehicle Signal Priority
  • Emergency Vehicle Signal Priority
  • Monitoring and Management of Fixed Route Transit
  • Transit Information Systems
  • Transit Security systems
  • Transit electronic payment systems
  • Smart work zones
  • Road Weather Information Systems

Evaluation Tool
  • Combined Incident Management and DMS/HAR

IM Evaluation
  • Queuing analysis is used to calculate incident
    delays taking incident frequency, duration, lane
    blockage, and traffic demand variations into
  • Queuing theory equations implemented for
    different periods of the day
  • Shift of fatalities to injuries as well as
    secondary incident savings
  • Evaluation of emission and fuel consumption
    benefits based on saving in vehicle-miles
    traveled in queues rather than on default
    reduction factors

Evaluation Methodology
  • Total delay for all the vehicles during one given
    type of incident is determined by queuing
  • Multiplying the total delay per incident with
    number of incidents yields the total annual
    incident delay
  • The deployment of incident management reduces the
    incident duration. The default value is based on
    I-95, I-595, and I-75 in FDOT District 4.

Incident Type Incident Rate (No. of Incidents per MVMT) Incident Duration (Minutes)
Shoulder Blockage 1.2358 40.1
1-Lane Blockage 0.3555 33.2
2-Lane Blockage 0.1453 43.5
3-Lane Blockage 0.0768 65.7
4 or More-Lane Blockage 0.0384 80.6
Evaluation Methodology
  • Safety
  • 21 of fatalities is assumed to be shifted to
    injuries with incident management, which is
    similar to IDAS
  • 2.8 reduction in total crash rate due to the
    reduction in secondary incidents based on the
    study by Mitertek Systems in San Antonio, Texas

Evaluation Methodology
  • Fuel Consumption and Emissions
  • The calculation for scenarios with and without
    incident management is based on the speeds of
    queued and non-queued vehicles and the
    vehicle-miles in queue
  • The average queue length is obtained by using the
    queuing equation, which in turn is used to
    determine vehicle-miles in queue

DMS/HAR Evaluation
  • The evaluation of DMS and HAR is combined with
    incident management instead of evaluating them
  • The activation of DMS and HAR causes route
    diversions, which reduces the traffic volume on
  • The increase in travel time for diverted vehicles
    is determined by the difference in average travel
    time along the mainline and that on alternative
    route(s) taking into consideration the average
    v/c ratio on alternative route and type of
    alternative route

Diversion Rate
  • Diversion Rate Studies
  • Diversion Rate Used in Evaluation
  • Stated preference up to 60 percent of the freeway
    traffic to exit the freeway ahead of the
  • Lower values for revealed preference
  • Function of a number of factors
  • Boundedly Rational switching behavior
  • Relationship used by Huchingson and Dudek

Evaluation Methodology
  • Road Ranger Service Patrol
  • The savings are total annual costs of the
    services provided by road ranger service patrol

Index Service COST per Activity Activity Number per Vehicle Mile per Year
1 Abandoned 98.43 1.23
2 Assist FHP 854.12 0.06
3 Debris 35.00 0.56
4 Diesel 38.00 0.01
5 Directions 0.00 0.02
6 Dispatch Not Found 0.00 0.66
7 Flat Tire 35.00 2.79
8 Gas 38.00 1.07
9 Jump 35.00 0.27
10 Lock Out 35.00 0.002
11 Minor Repair 35.00 0.27

Example - Incident Management Cost (1)
  • CCTV cameras
  • 18,000 per assembly and 10,000 per pole
  • One per mile. Covers both direction.
  • 6 year life-time for assembly and 20 year for
  • Maintenance 3,500 per camera per year

Example - Incident Management Cost (2)
  • Traffic Detectors
  • 11,000 per location (assuming true-presence
    microwave). 7,000 for the device (including
    installation and fine-tuning) and 4,000 for the
  • loop detector capital cost default value of about
    5,000 per detection station location per two-lane
  • OM cost per microwave detector is 400 per year
    and that of loop detectors is 600 per two lane
    per location
  • One every half mile cover one direction only.
  • Detector life is 5 years. Pole life is 10 years.
  • User can specify other detectors but should
    provide initial and OM costs and life-time.

Example - Incident Management Cost (3)
  • Service Patrol
  • The number of service patrol vehicles per beat,
    the area of coverage for each beat, and the
    number of vehicles in different shifts vary per
    location in an urban area.
  • Based on data obtained from District 4, the
    service patrol program in Broward County costs
    about 2,500,000 per year and cover 57.8 miles of
    freeways (contracted).
  • Thus, it is estimated that the cost of the
    service patrol program is about 43,250 per mile
    per year.

Model Input
  • ITS Component

Model Input
  • Alternative Information
  • Alternative letter
  • Modeling year
  • Working directory

Model Input
  • Parameters from Demand Model
  • Auto occupancy
  • Percentage of truck trips in Truck_Taxi trips

Model Input
  • 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)

Model Input
  • Information type provided by DMS and HAR

Model Input
  • 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

Model Input
  • 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.
Model Input
  • Impact factors
  • Diversion rate due to DMS and HAR
  • Fatality reduction rate and crash reduction rate

Model Input
  • Impact factors (Cont)
  • Average trip length on the mainline and on the
    alternative route
  • Percentage of diverted vehicles using freeway
  • Road ranger service patrol activities and costs