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TRANSCRIPT
ATSSA Meeting
Work Zone Safety - 2016
Mischa Kachler, P.E.
INDOT Work Zone Safety Section
December, 2016
2
Work Zone Safety - 2016
• Changes within the Work Zone Safety
Section
• Common Problems Found in Work Zones
• Work Zone Crashes
• Work Zone Safety Reviews
Outline
3
Changes within the Work Zone Safety Section
• Staff
• Org. Structure: Supervisor and 3 Engineers
• Currently: Supervisor and 2 Engineers
• All New Staff (Feb, May & July Start Dates)
• Direction of the Section
• Goal: Improve Effectiveness
• Identified 6 Core Functions
• Operational Changes through Policy Changes
• Result: Greater Focus on Work Zone Reviews
4
Changes within the Work Zone Safety Section
• Work Zone Safety Training
• IHCP Policy & Exception Training
• Queue Analysis Training
• Target Audiences:
• Construction Personnel
• Consultants/Designers and Reviewers
• District Staff
Core Function1: Education & Training
5
Changes within the Work Zone Safety Section
• Exceptions are required for Interstate
restrictions that exceed IHCP allowances
• 2016 To Date:
• 142 Completed
• 12 Currently Under Review
• Greenfield: 60% LaPorte: 9%
Seymour: 13% Crawfordsville: 8%
Ft Wayne: 9% Seymour: 1%
Core Function 2: IHCP Exceptions
6
Changes within the Work Zone Safety Section
• Work Zone Review
• Technical, Operational and Hybrid
• 2016 to Date: (Late start—July)
• 18 Formal Reviews
• Approximately 10 Informal Reviews
• Work Zone Related Fatal Crash
• FHWA Biennial Process Review
Core Function 3: Reviews
7
Changes within the Work Zone Safety Section
• Find new technologies and review for
implementation into work zones
• Portable Temporary Rumble Strips
• 42 in. Channelizers
• Meet with work zone product vendors
• Research projects with Purdue/JTRP
• LiDAR-Based Mobile Mapping System for
Lane Width Evaluation & Reporting
Core Function 4: Innovation
8
Changes within the Work Zone Safety Section
• Policies:
• IN Work Zone Mobility & Safety Policy
(pursuant to 23 CFR 630 Subpart J & K)
• Interstate Highways Congestion Policy
• Work Zone Guidelines
• Committees & Subcommittees:
• Traffic Standards
• TMA’s
Core Function 5: Policies & Committees
• Variable Speed Limits
• New Products Evaluation
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Changes within the Work Zone Safety Section
• Project Specific TTC Related Assistance
• Project Coordination & Planning
• Review of Design Exceptions, MOT Plans,
Special Provisions
Core Function 6: Subject Matter Resource
10
Work Zone Safety - 2016
Outline
• Changes within the Work Zone Safety
Section
• Common Problems Found in Work Zones
• Work Zone Crashes
• Work Zone Safety Reviews
11
Common Problems Found in Work Zones
• The types of problems encountered are
recorded
• A year-end report of the most frequently
encountered issues is sent to the Districts
• The goal is to improve upon the cited
issues during the following construction
season
Typically each year
12
Common Problems Found in Work Zones
• No Official Action or Authorization Forms
• Incorrect decrements to reduce Speed Limit
• Missing “Work Site” plaques
• Existing signs improperly or not covered
Temporary Work Site Speed Limit Sign Assemblies
13
Common Problems Found in Work Zones
Temporary Work Site Speed Limit Sign Assemblies
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Common Problems Found in Work Zones
• At flare tapers:
• No buffer space provided in advance of barrier
• Barrier incorrectly used to delineate lane shift
tapers
• Delineators on side and top missing or
poorly spaced
Temporary Concrete Barrier Issues
15
Common Problems Found in Work Zones
Temporary Concrete Barrier Issues
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Common Problems Found in Work Zones
• Confusing/conflicting pavement markings
due to:
• Incomplete removal
• Not removing the existing marking and applying
marking on top
Removal of Existing Pavement Markings
17
Common Problems Found in Work Zones
Removal of Existing Pavement Markings
18
Common Problems Found in Work Zones
Removal of Existing Pavement Markings
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Common Problems Found in Work Zones
• Insufficient acceleration distance provided
even if there is room to do so
• Yield sign locations too late and too close to
end of ramp
Entrance Ramp Issues
20
Common Problems Found in Work Zones
Entrance Ramp Issues
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Common Problems Found in Work Zones
• Inconsistent spacing and alignment
• Gaps in a line of drums, which is especially
problematic at exits
• Drums pushed into travel lanes at work sites
Construction Drums
22
Work Zone Safety - 2016
Outline
• Changes within the Work Zone Safety
Section
• Common Problems Found in Work Zones
• Work Zone Crashes
• Work Zone Safety Reviews
23
Work Zone Crashes
Crash Data (Unofficial)
SOURCE: ARIES CRASH REPORTING SYSTEM
Includes records for all INDOT routes with “Construction Indicator” marked “YES”
PREPARED BY KIM PETERS, INDOT TMC
CHART REMOVED FOR
PROPRIETARY
REASONS
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Work Zone Crashes
• In the past, 6 out of 8 fatal work zone
crashes involved a queue
• Interstate traffic is conditioned to
uninterrupted, high speed flow, and may
not stop in time for stopped traffic
Back of Queue
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Work Zone Crashes
• End of queue crashes are often deadly as
they involve a high speed vehicle striking a
stopped/slow vehicle
• Work zones with consistent daily queuing
should consider countermeasures
Back of Queue (Cont.)
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Work Zone Safety - 2016
Outline
• Changes within the Work Zone Safety
Section
• Common Problems Found in Work Zones
• Work Zone Crashes
• Work Zone Safety Reviews
27
Work Zone Safety Reviews
• Provide TTC guidance and assistance to
the PE/PS in the field
• Find potential safety and mobility issues
• TTC Quality Assurance and Quality
Control (QA/QC)
The goals of work zone reviews:
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Work Zone Safety Reviews
• Technical (QA/QC) Reviews
• Operational Reviews
• Hybrid Reviews
Types of Work Zone Reviews
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Work Zone Safety Reviews
• Focus on the quality of TTC devices and
setup with an emphasis on a technical
compliance with the MOT Plans & IMUTCD
• Are systematic and follow a checklist
• Are often the exclusive review type used on
projects where low volume or low speed
conditions exist
Technical (QA/QC) Reviews
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Technical (QA/QC) Reviews
31
Work Zone Safety Reviews
• Focus on the effectiveness of the TTC
deployment
• Are concerned with traffic backups, traffic
confusion, and traffic entering the work
zone
Operational Reviews
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Work Zone Safety Reviews
• Are the typical review type for projects
located on high volume or high speed
roads
• Aspects of a QA/QC review may be
incorporated as needed
• Will involve measuring traffic speeds,
queue length, and volume throughput
Operational Reviews (Cont.)
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Work Zone Safety - 2016
Work Zone Safety Section Contact Information
Gerry Montgomery, P.E. [email protected]
Work Zone Safety Engineer (317) 899 - 8627
Colin O’Keefe [email protected]
Work Zone Safety Engineer (317) 899 - 8632
Mischa Kachler, P.E. [email protected]
Supervisor (317) 899 - 8604