Presentation on theme: "Planting Seed Money for Work Zone ITS Applications Mainstreaming IWZ Systems in MN Marvin L. Sohlo P.E., Work Zone Standards Engineer Minnesota Department."— Presentation transcript:
Planting Seed Money for Work Zone ITS Applications Mainstreaming IWZ Systems in MN Marvin L. Sohlo P.E., Work Zone Standards Engineer Minnesota Department of Transportation Presented at ATSSA National Conference & Expo – February 11, 2008
Presentation Topics Education Quality Control Funding Issues
What is a Work Zone ITS System? Identity Crisis: Smart Systems, ITS in Work Zones, Smart Construction Devices… etc. Minnesota: Intelligent Work Zones IWZ Systems
Definition A system of devices that provides motorists, and/or workers,real-time information for improved mobility and safety through a work zone. What is a Work Zone ITS System?
Real Time Current information for making immediate decisions – traffic/environmental Static vs. Dynamic Systems
Static Systems Utilizes the motorists driving knowledge Typical system of traffic control devices Conventional or Electronic 24/7 with no change
Dynamic Systems Dynamic systems only supplement existing Static Systems Automatically identifies less obvious or confusing conditions or hazards Provides information immediately Appropriate message given
Does IWZ only include new technology? What once was new is now commonplace: Traffic Signals (fixed time vs. traffic actuated) Flashing Arrow Panels Portable Changeable Message Signs They are now components in IWZ Systems What is a Work Zone ITS System?
IWZ System Components Detection (radar, sonic, optical, etc.) Monitoring (quality, redundancies, etc.) Communications (cell, wired, radio, etc.) Analysis (algorithms, logic, procedures, etc.) Management (databases, backup, etc.) Information Delivery (dynamic traffic control devices such as CMS, broadcasting via radio or internet, and special warnings such as alarms or lights)
What is Possible? Mix and Match Detection Components Analysis Methods Information Delivery Each combination leads to a new system Scenarios are endless
What is Possible? Identify the Key Issues to be addressed: The underlining cause of an issue The action required to mitigate cause The best practice to generate action Implement a Solution
What is Possible? Different issues surface for each project Congestion / Volumes / Vehicle Types Travel Time / Delay / Alternate Routes Duration / Short or Long Term / Incidents Geometry / Temporary Alignments Traffic Movements / Turns / Merges Hazards / Weather / Obstructions / Clearances
What is Possible? Each issue requires a different level of information delivery importance Three Categories of IWZ Systems Conflict Warning Motorist or worker action required Traffic Control Commands / Instructions Traveler Information Background Information
What is Possible? Projects issue/problem solvers need to understand the possibilities available Field Office Minnesota IWZ Toolbox
Uniformity of terminology Listing of basic IWZ systems System informational sheet Typical Layout with Design Considerations Warrants and Benefits Options and Precautions New Information will be added continuously Minnesota IWZ Toolbox
Terminology Dynamic vs. Changeable vs. Variable ? Speed Advisory vs. Advisory Speed Limit vs. Work Zone Speed Limit? Dynamic Changeable Speed Advisory Speed Limit
Listing of IWZ Systems The systems that have been used successfully within Minnesota, Other basic systems used outside Minnesota that fall within the policies and standards for Minnesota TTC, or Basic systems that think outside the box Not field tested, but sound engineering concept Field tested, but not studied or documented
System Information Minnesota IWZ Toolbox will collect basic system information: Warrants Benefits System Design Guidance Precautions Alternate Solutions Best Practices Brainstorming Resource
Warrants Each system works best within Ideal traffic parameters / conditions Systems deployed when conditions fall outside Ideal may not perform as anticipated No improvement in safety or mobility An economic waste Ideal can be defined with Warrants
Benefits Properly deployed systems should display benefits to the motorists and/or workers Reduced incidents or severity Reduced delay times Reduced driver frustration Economic benefits Contractors / Construction Costs Motorists Most benefits are difficult to quantify
System Design Guidance Generic Best Practices (best guess) Typical system layout (device placement) Typical warning messages Typical sign designs Typical multi-system combinations
System Design Guidance Alternate Solutions Device alternatives Static system layout Precautions All TTC plans shall meet MN MUTCD standards without the addition of the IWZ System. All devices shall meet MN MUTCD and Qualified Products List standards and qualifications.
Brainstorming Resource Designers may add IWZ into the project to mitigate anticipated mobility and safety issues Project Engineers may solve mobility and safety issues during construction Contractors may increase their economical and safe working conditions
Conflict Warning Systems Trucks Entering Trucks Exiting/ Crossing Excessive Speed Prepare to Stop Work Space Intrusion Over Dimension Hazardous Roadway
Trucks Entering Warning Warrants Merging trucks must accelerate in traffic lane. Merge location is obscured to motorists. Small gaps in traffic. Benefits Driver awareness Fewer conflicts Safer operations Efficiency
Excessive Speed Warning Warrants Hazard requires reduced speed to safely negotiate. Hazard is unexpected. Benefits Provides warning and time/distance to slow.
Traffic Control Systems Dynamic / Static Late Merge Changeable Speed Limit Dynamic Speed Display (Your Speed) Dynamic Speed Advisory Temporary Ramp Metering
Dynamic Speed Advisory TRB DOI 10.3141/2015-02 Warrants Congestion Slowdowns Volumes not determined Benefits Improved thru-put by 7% Smoothed-out shockwave Speed differential reduction 25-35% Reduced panic stops
Dynamic Late Merge Warrants 1500 vehicles/hour Benefits Reduces queue 40% Removes lane speed differentials Reduces confusion
Static Late Merge Signs or PCMS messages on time-clock schedule Warrants Predictable sustained volumes over 1500 v/h Benefits Same as DLMS LOWER COST
Traveler Information Systems Travel Time Information Travel Delay Information Congestion Advisory Information Route Management Information
Travel Time System Warrants Distance to destination 10 miles or less No traffic signals Benefits Informed decisions Reduced tempers
Travel Delay System Warrants Easily identifiable location causing traffic delays Display should be placed prior to the location Benefits Informed decisions Reduced tempers Only a prediction of the added travel time (delay) is needed Signals factored in
Quality Control on IWZ Systems
Quality Control The Provider The Project The Penalties
Qualified Products List (QPL) All products found on a QPL have met applicable product requirements Various lists include: Construction / Maintenance Materials Bridge / Environmental Materials Uniform Traffic Control Devices Signals, Lighting, Signs, Pavement Markings TTC Devices and IWZ System Providers
IWZ System Provider QPL Separate lists for each category Conflict Warning Traffic Control, and Traveler Information Two levels of qualification Provisional Approved and Fully Qualified
QPL Qualification Process Application with references Previous types of systems deployed Expertise of staff Testimonials and Interviews Must agree to the Qualification Process Review materials and references as they apply to each of the 3 categories Provisional Approval if qualified
Provisional Approval on QPL Listed on QPL as provisionally approved for each qualified category. Allowed to bid on projects with IWZ needs. IWZ Provider competes with any other Approved IWZ Providers on the QPL. Upon successful bidding the IWZ Provider is awarded the IWZ project. Generally, IWZ Provider is a subcontractor
Field Testing and Reviews Three stages of reports are required: Preliminary Periodic Interim Final Summary Performance Reviews Continuous quality reviews
Approval Process Successful completion of the IWZ project. Full IWZ System Provider approval status on the QPL.
Project Expectations are Defined Projects with IWZ systems have: Temporary Traffic Control Plans IWZ System typical layouts IWZ System pay item Special Provisions for IWZ Pay Item Who, What, Where, Why and How Good
Special Provisions Who – require contact info Deployment & Calibration Maintenance Emergencies - Outages What – general system description Types of systems to be installed Equipment to be placed on project Where – general project location
Special Provisions Why – description of the GOALS of the IWZ System deployment How – how good rather than how Minnesota specifies the IWZ systems tolerances, public information format, and data reporting requirements. Performance Specs vs. Method Specs
Special Provisions Tolerances on Information Displayed +/- 1 minute during Non-Peak Traffic +/- 3 minutes during Peak Hour Traffic etc. Threshold / Event Triggers Speeds measured below 20 mph = Congested Speeds measured over 50 mph = Free Flow Water level measured 1 deep on road etc.
Special Provisions Messages to be displayed Various levels of messages Cautionary vs. Warning Allowable optional display methods Electronic (PCMS) vs. static signs with changeable LED bricks, or static signs with flashing warning lights, etc. Location of message displays Generally shown in the TTC plan Time of message display operation 24/7 vs. during PM rush hours, etc.
Special Provisions Data reporting requirements including: Event logs Quality control reports Problem/maintenance response logs Details dependent upon system and needs Specific data protocols to transfer data for other uses, such as: Mn/DOTs internal algorithms Posting on Mn/DOTs website, etc.
Not in the Special Provisions IWZ System provider determines: Number of sensors/detectors needed Type of system communications needed Algorithms needed to analyze the data Provider has latitude to utilize system components that are Cost Efficient Accurate, Reliable, Proven, Bullet-proof, etc.
Performance vs. Method Specs. WHY? --- we want the end result! Technology is constantly changing Little or No interest in component details IWZ Provider needs to know: Limitations of various models/types distances, power, obstacles, interferences, etc. Accuracy of various models/types ranges, repeatability, tolerances, etc. Reliability of various models/types compatibility, availability, interchangeability, etc.
Quality Assurance Field reviews of the systems Construction personnel observations District / Central Office reviews Motorists comments Quality Control Reports by the provider Operational Reports by the provider Raw data summaries if needed
The Penalties Poor or Non-Performance Daily / Hourly Monetary Deductions are set in the Special Provisions. Provisional Approval Status in jeopardy with non-successful project. Repeating Poor Track Record could cause removal from IWZ QPL.
IWZ Funding Issues
Funding IWZ Systems Historically: IWZ systems are not FREE !!! Only on Large / High Profile Projects: Public awareness Funding sources are available Intuitively easy to justify without warrant studies or B/C ratios due to high volumes, complexity, duration, and/or congestion. Completed IWZ Systems are not studied for economic and safety benefits.
Funding IWZ Systems Recent Status: Funding for construction is drying up. Bells & Whistles are being dropped. IWZ is considered fluff for designers and project engineers who have never used them. Rural areas have little experience with IWZ Systems. IWZ systems that are not field proven for benefits are considered economically risky, confusing and difficult to specify.
Funding IWZ Systems Current Changes: Confidence in IWZ Systems MN IWZ Toolbox is collecting warrants and benefits for each system Standard specifications are developed Traffic Office is working with the designers and project engineers to develop special provisions Separate funding sources IWZ Seed Program was developed ITS Research Funding is looking at Work Zones
IWZ Seed Program State Funding for ITS programs statewide controlled by Guidestar. Guidestar is a group of public, private and educational partners dedicated to improving and promoting ITS in MN. Guidestar dedicated a portion of the ITS Program funds for 3 years.
IWZ Seed Program $ 300,000 per fiscal year (est.) Started: July, 2007 Ends: June, 2010 IWZ Committee approves projects Minnesota Guidestar member Construction Office members (2) Traffic Engineering Office members (2)
IWZ Seed Program Guidelines were developed: www.dot.state.mn.us/trafficeng/workzone/ Limitations on funding distribution: Districts may receive up to 100% funding on first two IWZ systems Additional projects up 50% funding Committee may limit funding based upon: Equitable distribution between Districts Previous experience level with a system type Districts previous experience with IWZ
Solve Existing Issues Identify needs for IWZ Systems on an existing construction project. Projects could benefit from systems such as: Earth moving jobs could utilize trucks entering / exiting / crossing systems. Lane closures could utilize dynamic late merge systems. Large congestion generating jobs could utilize travel time / delay time / alternate route systems.
Solve Existing Issues Add the IWZ System to the existing const. project via a Supplemental Agreement or Work Order: IWZ description is written and approved. Negotiated cost is approved. Funds for the IWZ System are transferred to the Construction Project.
Mitigate Future Issues Identify Mobility or Safety issues that could be mitigated via the usage of an IWZ System. This is the ultimate goal of our Mainstreaming IWZ Program Design the IWZ Systems plans and specifications into the construction project.
Mitigate Future Issues To design IWZ Systems into a project requires scoping, design/development, plans, specifications and a cost estimate. Estimates are always necessary for the bidding process, but within the Seeds Program, the cost estimate is critical for the programs budgeting. IWZ operational concepts are reviewed and approved continuously from scoping to design. Estimated IWZ costs are approved. A maximum funding amount is assigned to the IWZ pay item.
Add IWZ Capabilities IWZ components may be purchased for the District for multiple usage Submit a proposal for the equipments usage and include the cost for purchase. Funds are transferred to the Districts Scientific Equipment Budget. Example: Dynamic Speed Display Sign Uniform in design, publicly and technically well- established, self-contained, easy to deploy, and used frequently in maintenance or construction. Not economical to have an IWZ system provider deploy the system.
IWZ Seed Funding to-date Excessive Speed Warning with a Snow Plow Warning Message S.A. on TH 10 - Detroit Lakes, MN Multi-lane traffic diverted onto single lane 65 mph traffic slowing to 35 mph Narrow curve with restricted sight-distance
IWZ Seed Funding to-date Retaining wall clearance Plows may cross centerline Messages activated from within the plows
IWZ Seed Funding to-date Travel Delay Information, Stopped Traffic Warning and Video Surveillance Service. TH 61 – Hastings, MN Restrict traffic to one lane Large delay times Delay times displays near alternate river crossing locations
IWZ Seed Funding to-date Delay times displayed near alternate route choices to avoid the congestion within the city Large south bound traffic queues expected and panic stops could be common during construction RTMC and State Patrol will monitor traffic visually for incidents
IWZ Seed Funding to-date Dynamic Speed Display sign and Speed Data Recorder Equipment TH 169 approach to the Minnesota River Restricted to a single lane Severe grades Reduced speed limits Speed monitoring devices before/after data assist in effective DSD sign placement. Proposed usage on several projects within the District
Funding from ITS Research ITS During Major urban Reconstruction Guidestar has contracted with a group of ITS partners to study a deployment concept for IWZ systems. Group consists of professionals in: ITS engineering IWZ deployment expertise Equipment supplier Temporary traffic control expertise
The group is anticipated to find expedient methods to deploy IWZ systems on the I-35W and TH 62 Crosstown Commons interchange project. Approx. $150,000 available Contract finalized Dec, 2007
As a companion part of this project, an independent 3 rd party has been contracted to review the processes and procedures followed by the group. Approx. $50,000 available Will monitor the systems for useful warrant and benefit information
To-date: Excessive Speed Warning System Tight narrow curve with reduced speed limit Placement of Speed Detection Devices Data transmitted to Mn/DOTs RTMC Travel Times computed for the corridor Times are displayed on permanent and PCMS
Questions More information available at: www.dot.state.mn.us/trafficeng/workzone MN IWZ Toolbox IWZ Seed Program IWZ QPL Qualification Process ATSSA National Conference Presentation Contact Information: 651-234-7380 email@example.com