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GET ACTIVE! Deppygloying Active Traffic Mana Gement GET ACTIVE! Deppygloying Active Traffic Mana gement Glenn N. Havinoviski, P.E. ITS Virginia AitAssociate Vice PidtPresident, TttiTransportation StSystems Annua l Mee ting and Ex hibition Iteris. Inc. Charlottesville, Virginia Sterling, Virginia April 2010 ATM Defi niti on . Dynamic management of traffic conditions in manner that reduces recurrent, nonrecurrent congestion. Increases throughput, safety thru integrated systems . Automation to optimize performance quickly . Combines operational strategies to fully (Washington State DOT) optimize existing infrastructure, provide measurable benefits to the network and to motoring public. FHWA, August, 2007; TRB update (Subconmittee on ATM) 2 Why ATM? . Funding challenges and societal issues are driving development of new, integrated transportation operations strategies . ATM provides a way to simultaneously address capacity, demand management, mobility and safety issues 3 Early Example (NJ Turnpike) 4 5 6 In tegra tion of Spec ific Elemen ts Active Traffic Management Dynamic Lane Variable Speed Road Queue Use of Shoulder CtlControl Lim its WiWarning StSystems As Tra ffic Lane 7 ATM May Also In tegra te… Active Traffic Management Dynamic Lane Variable Speed Road Queue Use of Shoulder AidtAccident Control Limits Warning Systems As Traffic Lane Pull Offs With Call Boxes Traffic & Automated PTZ Dynamic Incident Speed Video Messaging Detection Enforcement Monitoring 8 Typical ITS Architecture Elements in ATM 9 Integrated Operating Strategies . Managing Corridors of Fixed Capacity . Managing Corridors of Reduced Capacity . Managing Road Safety Under Inclement Conditions . “Managed Lanes” (incl. part-time HOV, toll operations) 10 Examples of Integrated Strategies • Managgging Corridors of Fixed Ca pacit y Chesapeake Bay Bridge, MD I-66, Fairfax, VA (reversible lanes on (peak period span during summer) shoulder lane running) 11 Examples of Integrated Strategies • Managgging Corridors of Fixed Ca pacit y E L E M E N T N O T E S Dynamic Lane Unbalanced Flow / Reversible Lane Control or Shoulder Running Indications (typically Time-of-Day schedule) Variable Speed Based on prevailing downstream conditions; may also be reduced Limits during periods of shoulder running (done in UK) Use of Shoulder Normally time-of-day schedule, but As Traffic Lane could be expanded per traffic demand. Dynamic Rerouting traffic to alternate routes Messaging as appropriate 12 Examples of Integrated Strategies • Managing Corridors of Reduced Capacity Germany (Bavarian Motorways) 13 Examples of Integrated Strategies • Managgging Corridors of Reduced Cap acity E L E M E N T N O T E S Dynamic Lane Warn of lane closure and Control merggp(p)e traffic into open lanes (Lane Taper) Variable Speed Reduce speeds upstream of blockage or Limits vehicle queuing (Speed Funnel) Use of Shoulder Implement if immediate need for rerouting As Traffic Lane vehicles to other locations QeeQueue Warning / Dynamic Warn of specific delay, reroute traffic to alternates as appropriate Messaging 14 Examples of Integrated Strategies • Managing Road Safety Under Inclement Conditions 15 Examples of Integrated Strategies • Managing Road Safety Under Inclement Conditions E L E M E N T N O T E S Dynamic Lane Control Lane Taper upstream of lane closures Variable Speed Reduce speeds upstream of Limits low viibilitisibility, rai/i/in/ice/snow (Sd(Speed Funne l) Queue ﻋﺎﺻﻔﺔ رﻣﻠﻴﺔ Sandstorm Warning / Dynamic Weather, rerouting advisories Warning 2 km Messaging 16 Examples of Integrated Strategies • “Managed Lanes” (incl. part-time HOV, toll operations) I-35W, Minneapolis (part-time HOT in AM Peak) I-35W, Minneapolis (shoulder used for HOT in AM Peak) (Photos from Mn/DOT) 17 Examples of Integrated Strategies • “Managed Lanes” (incl. part-time HOV, toll operations) E L E M E N T N O T E S Dynamic Lane Indicate shoulder open or special ◊ Control symbol for HOT use of regular lane Variable Speed Based on prevailing downstream conditions; may also be reduced Limits during periods of shoulder running Use of Shoulder As Traffic Lane If used, time-of-day based on HOT policy Dynamic Dynamic toll info, along with Messaging travel time /advisory info 18 Typical Scenarios . “Normal Traffic Conditions” . Recurring Congestion (speed reductions based on trigger) . Congestion Price change (downstream volume trigger) . Shoulder blockage . Minor Accidents (< 15 min expected duration) . Ma jor Accid ent s (> 15 min expected dura tion ) . Road / Bridge / Tunnel Closure . Scheduled Road Work . Weather Advisory . Special Event 19 Operational Rules . Confirm that a particular scenario is occurring (e.g., recurring congestion, major accident) or that it has ended – Real-time data collection,,g, monitoring, confirmation needed . Identify response plans corresponding to scenario and location 20 Decision Support Process • Identify Operational Criteria / Triggers • Develop Operational Rules • Formulate Response Plans • Control Patterns • Control Logic (Conflict Monitoring) • Dynamic Pricing (managed lanes) • Monitor Conflicts Between Scenarios, Establish Priorities 21 Example: Shoulder Running terminated due to accident (I-66, VA) 22 Level of Automation for ATM Activities Depends on Application • Shoulder, reversible lane operations require confirmation that lanes are clear (e.g. operator CCTV monitoring, service patrol) • Pre-programmed responses for congestion, incidents, lane closures can expedite message deployment • Some human oversight needed even with automation 23 Notable Examples of ATM Tools in U. S. US (legacy systems) – Peak period shoulder running (I-66 and I-264) – Reversible lane facilities ((,TOD, I-95/395) – Major bridges / tunnels (VSL, lane control) – Work zone syy(,qg)(stems (VSL, queue warning) (I-95/495) . US (integrated deployments) – Managg(ed lanes (UPA for I-35W in MN) – Washington State 24 Notable Overseas ATM Deployments . Netherlands (since 1981) . UK (M42, M25, other) . Germany (since ‘70s) . Turkish motorways . Hungary (M0 ring road) . Dubai (2007) 25 Example of Benefits . UK M42 motorway with 120,000 ADT –Travel time 30% less –Noise reduction –Accident reduction up to 13% –FlFuel consumption reddduced bby 4% –Vehicle emissions reduced by 10% –84% of drivers felt that system was safe 26 Example of Benefits (VTRC, Fudala and Fontaine, 2010) . I-95/495/WW Bridge Smart Work Zone – Variable speed limits, queue warning signage, detection – Limited application, but some observations noted: • VSL works best when adequate capacity available • VSL at exit of control zone helppgs manage outflow • VSL can delay onset of congestion even if as few as 20% of drivers obey reduced speed indication • Benefits accrue over extended period, so long-term application of ATM could be more beneficial than short-term 27 Deployment Challenges . Enforcement of VSL . Level of Operational Supervision Greater Than Non-ATM . Benefit-cost over time – may affect spacing and level of deployment . Coordination with static signing . Incorporating ATM info into IntelliDrive solutions in future? 28 Summary . It’s All About the Integration! . Deployments to Date Have Produced Consistent Travel Time and Safety Benefits . Need the Commitment to Full-Time System Operations, Enforcement . Need to Plan the Operations . “Supervised Automation” Approach 29 SHILL ALERT SHILL ALERT SHILL ALERT ITSVA will offer a workshop, “Active Traffic Management - An Overview” on Wednesday, May 26th, at the Jepson Alumni Center located at the University of Richmond. The workshop is from 12 Noon – 2 PM with a bblhbiit1130AMbrown bag lunch beginning at 11:30 AM. The cos t o f the wor ks hop an d lunch for ITSVA members is $90 and $120 for non-members. Attendees will receive 2 CEU credits and you must register to attend. RitRegister on litline at www.itsva.org OR ma il your c hec k to: ITSVA Attn: CEU Workshop 600 Peter Jefferson Parkway, Suite 300 Charlottesville, VA 22911 Instructor: Glenn N. Havinoviski, PE 33 Presentations tt Glenn N. Havinoviski, P.E. Associate Vice President, Transportation Systems pe\Initiatives\PowerPoin 107 Carpenter Drive, Suite 230 oo Sterling, VA 20164 (703) 925-3812 E-Mail: [email protected] \Mastiff\sharedusers\ch \\ 34.
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