Work Zones Work Zone Challenges Construction worker and road user - - PowerPoint PPT Presentation

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Work Zones Work Zone Challenges Construction worker and road user - - PowerPoint PPT Presentation

Jun 27, 2023 378 likes •706 views

Accelerating solutions for highway safety, renewal, reliability, and capacity Regional Operations Forum Work Zones Work Zone Challenges Construction worker and road user safety Work zone (WZ) congestion and delay Roadway capacity and

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Regional Operations Forum Work Zones

Accelerating solutions for highway safety, renewal, reliability, and capacity

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Work Zone Challenges

  • Construction worker and road user

safety

  • Work zone (WZ) congestion and delay
  • Roadway capacity and speed

reductions

  • Alternate routing and travel

route availability

  • Day and nighttime

condition awareness

  • Traffic pattern changes
  • Incident management

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Types of Work Zones

Five categories:

  • 1. Mobile
  • 2. Short duration
  • 3. Short-term stationary
  • 4. Intermediate-term stationary
  • 5. Long-term

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Policies: Facilitators of WZ Management

  • Provides guidance/direction for work zone

management

– Systematic consideration of work zone impacts – All stages of project development – Addresses safety and mobility needs of travelers/ workers

  • Work Zone Safety and Mobility Rule

– http://www.ops.fhwa.dot.gov/wz/resources/final_rule/language.htm

  • Can encourage use of specific strategies the

agency has found effective, such as ITS

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Work Zone Safety and Mobility Final Rule

  • Established requirements for

– Systematically addressing WZ safety and mobility – Develop strategies to manage impact on federal-aid highway projects

  • Published: September 2004
  • Effective date: October 2007
  • Required agencies to develop WZ policy

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Examples of Work Zone Policies

  • Washington State DOT

– Secretary’s Executive Order, February 2007 – WSDOT must make “safety of workers and the traveling public our highest priority during roadway design, construction, maintenance, and related activities” – Sets out responsibilities

  • Utah DOT

– Requires TMP – Sets out responsibilities – Establishes “Traffic Guidelines for Work Zone Safety and Mobility”

  • www.ops.fhwa.dot.gov/wz/resources/final_rule/policy_examples.htm

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What is a TMP?

  • Transportation Management Plan (TMP)
  • Design documents show how a project will be built
  • Shows how traffic will be managed during

construction

  • Required on ALL federal-aid projects
  • Scalable to the type of project being considered
  • Considered a living document

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TMP Development Process

FHWA Work Zone Mobility Final Rule “Developing and Implementing Transportation Management Plans for Work Zones”

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Example TMP

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WZ Management Strategies

  • Traffic control
  • Contract incentives
  • Accelerated construction
  • Contraflow lanes
  • Demand management
  • Traveler information

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Opportunities for Coordination

  • TMPs require coordination with surrounding

projects.

  • What happens when coordination doesn’t exist?

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Work Zone ITS

  • Traffic management systems

– Traditional traffic management

  • Monitoring
  • Signals
  • Ramp metering

– Dynamic merge systems – Variable speed limit/active traffic management (ATM) systems

  • Traveler information systems
  • Incident management systems
  • Intrusion alarm systems
  • Automated speed enforcement/feedback systems

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Dynamic Merge Systems

  • Dynamic signs and devices control vehicle merging

approaching lane closures

  • Changes lane use instructions based on current

traffic conditions

  • Sensors

determine congestion level

  • r queue length
  • “Early” and “Late”

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Dynamic Early Merge

  • Addition to standard

traffic control

  • No passing zone at

back of queue

– Detected by temporary speed detection

  • Fixed no passing

signs

– Flashers indicate no passing zone

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Dynamic Late Merge

  • Addition to standard

traffic control

  • Easy trailer mounted

DMS deployment

  • Fast adjustments
  • DMS active only

when congested periods

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Dynamic Late Merge

1st Sign – Approximately 3 miles upstream

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Dynamic Late Merge

2nd Sign - 1.5 miles from Taper

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Dynamic Late Merge

3rd Sign – Located at Taper

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Variable Speed Limit

  • Provides ability to set speed limit

based on work zone conditions – Type of work being done – Characteristics of work zone

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New Mexico DOT ITS Benefits

  • The Big I Reconstruction project
  • NO FATALITIES
  • Reduced crashes and secondary crashes by 32%
  • Reduced incident management times from 45 to 25 min
  • Saved effort through automation
  • Reduced traffic through work zone

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Other Examples

  • New Jersey I-295 Project

– Real-time travel times

  • I-93 in Salem, New Hampshire

– Changeable message signs, sensors, cameras – Work zone travel conditions via the Internet

  • I-295 in Washington, DC

– Real-time traffic information via Internet

  • http://www.ops.fhwa.dot.gov/wz/its/index.htm

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GROUP DISCUSSION

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Best Practices – New York City DOT Online Mapping

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Best Practices – Oregon DOT Corridor-Level TMPs

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Best Practices – VDOT LCAMS

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SHRP 2 Project R11

  • WISE Software (Work Zone Impact and Strategy

Estimator software). Goals:

– Document effective practices for executing highway renewal activities – Examples of agency and project org. designs – Develop new tools, techniques, and processes – Provide guidance for selecting tools, techniques, performance measures, and practices – Assess and develop training needs and materials

  • Project is complete with planning and operations modules

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Recommended Resources

  • Work Zone Safety and Mobility Final Rule

http://www.ops.fhwa.dot.gov/wz/resources/final_rule/lang uage.htm

  • Developing and Implementing Transportation

Management Plans for Work Zones http://www.dot.state.mn.us/trafficeng/otepubl/fhwa/trans- mgmt-plans.pdf

  • Freeway Management Handbook

http://ops.fhwa.dot.gov/freewaymgmt/publications/frwy_ mgmt_handbook/toc.htm

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Additional Resources

  • FHWA work zone website

http://www.ops.fhwa.dot.gov/wz/index.asp

  • National Work Zone Safety Information Clearinghouse

http://www.workzonesafety.org/about/

  • Work zone resources

http://www.ite.org/education/Workzones/

  • Coordinating, Planning, and Managing the Effects of

Roadway Construction with Technology

http://www.its.dot.gov/press/2009/road_construction_tech.htm

  • AASHTO’s ITS in work zones

http://www.transportation.org/?siteid=42&pageid=1939

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Additional Resources

  • ITS Safety and Mobility Solutions: Improving Travel

Through America's Work Zones http://www.atssa.com/galleries/default- file/2008July21_ITS_Safety_and_Mobility.pdf

  • Minnesota Intelligent Work Zone Toolbox

http://www.dot.state.mn.us/trafficeng/workzone/iwz/MN- IWZToolbox.pdf

  • Comparative Analysis Report: The Benefits of Using

Intelligent Transportation Systems in Work Zones http://www.ops.fhwa.dot.gov/wz/its/wz_comp_analysis/c

  • mp_anl_rpt_08.pdf

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Additional Resources

  • Work Zone Operations Best Practice Guidebook

http://www.ops.fhwa.dot.gov/wz/practices/best/bestpracti ces.htm

  • NCHRP Synthesis 379: Selection and Evaluation of

Alternative Contracting Methods to Accelerate Project Completion http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_syn_37 9.pdf

  • WSDOT ATM SOP: (section F covers ATM in work zones)

http://www.wsdot.wa.gov/NR/rdonlyres/788B7FFC- 6BE3-426A-9882- 0430180900A6/0/StandardOperatingProceduresdraftv62 .pdf

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Homework Takeaways

  • Follow the Work Zone Safety and Mobility Final Rule
  • Where does operations fit in TMP development

within your agency? – Are you involved at the right level and stage? – If not, who can help to get you there?

  • What new capabilities, resources, or knowledge will

help to benefit planned special event operations in your region?

  • Do cost management and recovery.

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