work zone & incident management in wisconsin process & applications michael s. hardy...
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Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Work Zone & Incident Management
in WisconsinProcess & Applications
Michael S. HardyWisconsin D.O.T.633 W. Wisconsin Ave, Suite 1200Milwaukee, WI [email protected]
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
1) Process
Marquette Interchange Reconstruction
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Outline
• Project overview
• Incident Management Planning for construction
– Traffic Mitigation
– Approach
– Solutions
• Future steps
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Reconstruction Overview
• Downtown Milwaukee, Wis.
• 1968: Interchange is dedicatedand is opened to traffic Dec. 23
• Today:– 5-level interchange
– 300,000 vehicles per day
– 120,000 downtown jobs
– 7 million downtown visitors
• Problems:– Structures are at end of useful life
– High crash rates
– Increasing traffic congestion
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Reconstruction Overview
• Rebuild and realign entire interchange
• Minimize construction time– 4 years (2004 – 2007)
• Minimize impacts– Keep downtown “open for business”
– Through movements will remain open
• Some closures of freeway-freeway ramps
• Closure of service ramps
• Reduced number of lanes, speed, lane widths, shoulders
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
The TIME program:A HEAD START
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Managing a Planned Incident
• Traffic Mitigation Task Force - Proposals
– Freeway operations and incident management
– Public information
– Transit and demand management(commuter options)
– Local road operations
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Scenario-Based Operations Planning
• Table-top exercises
– Every day operation during construction
– Major incident within interchange
– Major incident on bypass
– Major special events
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Table-Top Exercises
• Multi-agency, multi-disciplined
• Define conditions and assumptions
• Verify roles and responsibilities
• Identify problems and needs
• Develop solutions
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Results/Proposals
• Maintain freeway operations– Maintain “Monitor” Freeway
Traffic Management System
– Additional CCTV and detectioncoverage for interchange surveillance
– Entrance-ramp meteringand improvements
– TOC Night staff
– Web page CCTV image-sharingwith stakeholder
– FTMS system preservation contract –construction in 2003 prior to reconstruction
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Results/Proposals
• Maintain freeway operations (alternate routes)
– Signal re-timing, upgrades
– Emergency vehicle preemption
– Intersection improvements
– Parking restrictions
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Results/Proposals
• Emergency services/public safety– Crash investigation sites
– Hydrant stand-pipes
– Enforcement pads
– Smaller fire-response vehicles
– Additional freeway patrols
– Revise SOP
– Pre-positioned emergencytraffic control equipment
– Full-time construction – public agency liaison
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Results/Proposals
• Commuter options
– Additional localand Freeway Flyerbus routes
– Park-n-Rides
– Free transfer programs
– Transit-Fairs
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Results/Proposals
• Travelerand public information– Business Survival Guide
– Kiosks at major events
– Web page for parking options
– Brochures
– Web page
• Construction updates
• Map your own travel route with real-time conditions
– Alternate route “familiarization” tours
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Next Steps• Further refinement/prioritization of solutions
– Funding (Steering Committee)
– 20 mil / 210 mil
• Implement some solutions this year– LET Contracts / Service Procurement
– Interagency Agreements
• Process review
• Resources – Contract administration
– Work Zone accountability
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
2) Application
Travel Time Prediction SystemTraffic-Responsive Variable Message Sign System
Alan J. Horowitz, UW MilwaukeeThomas Notbohm, WiDOT
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Characteristics of Work Zone
• I-94, south of Milwaukee County• 12 miles long• Normally 3 lanes, reduced to 2 lane + no
shoulder• Normally 65 mph, reduced to 55 mph• Peak volume, 4000 vph• Queues sometimes exceed 2 miles• Frontage road for full length
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Characteristics of Signage System
• “Travel Time Prediction System”– Commercial product (4 mo. Lease)– Detectors (volume + occupancy)– Desktop computer (field office)– Portable CMS– Radio communication between devices (
• No other reliable source of information about delays though the work zone
• No information about alternative routes
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Characteristics of System Function
• Display Travel Time to end of work zone, and distance to end of work zone
• Travel time updates every 30 seconds• 4 minute intervals to control update frequency• 85% occurrence of predicted travel time within
30% of actual travel time • No other reliable source of information about
delays though the work zone• No information about alternative routes
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
TIPS Signand Sample Message
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
SignDeployment
• Location of TIPS – Detectors (5)– Signs (4, 2 Interstate)– Work zone
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Experimental Design
• Before/After (70 days)• Entirely in the summer months, June 11 to
August 19• Virtually everything held constant, except:
– Travel lanes open– Operation of the signs
• Work zone in existence well ahead of data collection
• Same counting devices (microwave, tube)
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Cutlines• B,C,D are
TIPS• F-G are
tubes• All data
aggregated to 15 minute intervals
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Weekday 15-Minute Counts at Cutlines
Cutline I College I I Ryan I I I County Line Before After Before After Before After I -94 717 720 665 612 665 612 27th Street 381 370 112 157 22 26 Howell 267 269 249 281 155 182 CTH V 37 49 On Ramp @ 27th 40 26 Total 1365 1359 1026 1050 919 895
3 hours each of four Thursdays and Fridays, before and after (96 samples before, 96 samples after)
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Sunday 15-Minute Counts at Cutlines
Cutline I College I I Ryan I I I County Line Before After Before After Before After
I -94 789 783 740 693 740 693 27th Street Road 328 321 113 149 39 64 Howell 141 146 192 210 124 151 CTH V 53 72 On Ramp @ 27th 38 31 Total 1258 1250 1045 1052 994 1011
3 3/4 hours each of four Sundays before and 3 Sundays after (60 samples before, 45 samples after)
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Conclusion
• A 10% alternative route selection rate during peak periods is achievable when accurate, up-to-the-minute, information about delay through a work zone is provided and there is an attractive set of alternative routes
• No significant change in crash numbers compared to opposite direction, but observed reduction in injury frequency
• More detection to increase accuracy
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
3) Application
Work Zone Speed Advisory System
Tom Notbohm, WisDOTScott Nelson, WisDOT
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
WiDOT Project Layout – 4 Sensors, 3 VMS
VMS
RTMS
Mobile Control Unit
RTMS1
RTMS2
RTMS4
VMS1
VMS2
VMS3
RTMS3
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Characteristics
• Display Speed of traffic and distance downstream in work zone
• Speed reports will be– > 50mph, blank– 20-30, 30-40, 40-50, for respective range– ,20mph, STOPPED TRAFFIC AHEAD
• Application starts May 5, 2003• 2 other fixed incident CMS, and 6 portable
project CMS
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Wireless Comm.to Internet=
VMS1&
RTMS2
LaptopWith
IntelliZoneSoftware
VMS 2&
RTMS4
VMS3
MCU&
RTMS1
Functional Block Diagram – 4 Sensors; 3 VMS
Internet
RTMS3
Work Zone & Incident Management in WisconsinWork Zone & Incident Management in Wisconsin
Field Devices – US 41
MCU VMS2 VMS3
RTMS1 RTMS2 RTMS4
VMS1
RTMS3
Traffic SensorTrailer