Materials, Pavements & Transportation Operations CONCEPTS FOR ENHANCING THE EFFECTIVENESS OF TRAFFIC...

Materials, Pavements & Transportation OperationsTransportation

Institute

Texas

CONCEPTS FOR ENHANCING THE EFFECTIVENESS OF TRAFFIC CONTROL PLANS

Stuart AndersonGerald Ullman

Making Work Zones Work Better Workshop


Institute

Texas

Background

• Maintenance of traffic issues and traffic control plans (TCP)

• Temporal and spatial requirements impact construction– Temporal - time– Spatial - dimensions

• Options available


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Texas

Background

Traffic Management Requirements

Options Available

Temporal Daytime off-peak work (i.e., 9 a.m. – 4 p.m.) Nighttime work (i.e., 7 p.m. – 6 a.m.) Weekend work (i.e., 7 p.m. Friday – 6 a.m. Monday) Intermediate-term work (overnight to 3 days duration) Long-term work (longer than 3 days duration)

Spatial Lateral Lane shifts onto a shoulder or to temporary lanes Lane constrictions Lane closures Number of lanes closed

Single lane Multiple lanes

Traffic-handling schemes Crossovers Interior (middle) lane or lanes Reversible express lanes

Total roadway closures Longitudinal Full length closures

Advancing limited closure Leap-frogging limited closure


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Texas

Problem

• Lack of early and sufficient input of traffic and construction expertise

• Policy directives, funding and other factors often limit alternatives

• Solution may be sub-optimal


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Texas

Preferred Practice

• Prior to detailed PS&E design• During detailed PS&E design

Phase I

Inside Shoulders Widened

Phase II

ConstructionArea

Traffic on Widened Inside Shoulder

ConstructionArea

Phase III

Traffic on New Pavement

Construction Area


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Texas

Consider

• Pavement related processes – What is done– Pavement treatments and

materials


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Texas

Consider

• Non-pavement related processes– How is pavement treatment

accomplished– Traffic and construction related

issues


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Texas

Process Approach• Integrate pavement and non-

pavement related processes• Process developed under NCHRP

Project 10-50A• Fundementals

– Start early in project development– Use multidisciplinary team approach– Analyze Traffic approaches to minimize

impacts– Promote construction input on

continuous basis


Institute

Texas

Process Approach• Four main steps

– Identify candidate sections– Identify pavement condition– Screen potential strategies– Evaluate feasible strategies

• Content of steps– Objectives– Key activities– Issues to consider– Resources– Practical illustrations


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Texas

Process Approach• Validated by industry• Case studies demonstrated

applicability• Documented in final report

– A Process for Selecting Strategies for Rehabilitation of Rigid Pavements, Final Report, NCHRP Project 10-50A, February 2002

– Contact NCHRP Program for Copy


Institute

Texas

Preferred Strategy

RequireAdditionalInformation?

1. Select Possible Treatments2. Identify Traffic and Construction Issues3. Estimate Preliminary Cost4. Identify Feasible Strategies5. Identify Feasible Strategies

STEP 1 Identify Candidate Sections

STEP 2 Identify Pavement Condition

1. Conduct Survey2. Conduct Field & Laboratory Tests3. Identify Distress Mechanisms

STEP 3 Screen Potential Strategies

STEP 4 Evaluate Feasible Strategies

1. Determine Level of Traffic and Construction Analysis2. Analyze Traffic Alternatives3. Perform Constructibility Analysis4. Determine Contracting Approach5. Perform Life Cycle Cost Analysis (LCCA)6. Recommend Most Appropriate MRR Strategy

No

YesSelectionProcess


Institute

Texas

Screen Potential Strategies


Yes

Output:

Required Design Information Feasible Strategies

RequireAdditionalInformation?

1. Select Possible Treatments2. Identify Traffic and Construction

Issues3. Estimate Preliminary Cost4. Identify Feasible Strategies


STEP 2 Identify Pavement Condition

No


Institute

Texas

Resource

• Description of resource• Relevance to analysis• References for more information• Examples

– Work zone analysis tool - QUICKZONE– Workshop approach - Get In, Get Out,

Stay Application– Constructibility Review Process

Workbook - NCHRP Report 391


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Texas

Traffic and Construction Issues


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Texas

Traffic and Construction Issues:Caltrans I-710 Alternative• Traffic

– Segmental full closure (3 to 5 miles) in one direction

– All lanes available to traffic weekdays

– Install ITS during construction– Recommend use of alternate

routes (I-110, I-605, Lakewood Blvd. and other local streets)


Institute

Texas

Traffic and Construction Issues:Caltrans I-710 Alternative• Construction

– Two concrete plants– Concrete plants produce about 1800

CY per hour– Back-up equipment and extra

sources of materials– Recycle existing PCC pavement– Ten-hour shifts– Three stage operation– 16 weekends


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Texas

Evaluate Potential Strategies


1. Determine Level of Traffic andConstruction Analysis

2. Analyze Traffic Alternatives3. Perform Constructibility Analysis4. Determine Contract Approach5. Perform LCCA6. Recommend Preferred Strategy

Preferred StrategyOutput :



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Texas

Level of Analysis

• DOT standard traffic and construction approach

• DOT standard traffic and construction approach but with some enhanced techniques to address special issues

• A corridor wide project-oriented traffic and construction approach


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Texas

Traffic Analysis:Michigan I-496 Project


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Texas

TCP Development for PS&E• Traffic • Constructibility reviews• Contract methods• Materials and equipment

See NCHRP Synthesis 293


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Texas

Benefits

• Efficient and cost effective construction

• Minimize impact on road users, local businesses

• Safer work zones• Special needs identified early


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Texas

Application

• Most projects types and sizes• May have higher impact on

projects with high traffic volumes• Concepts currently being tested

– TRB Task Force A5T60, “Accelerating Innovation in the Highway Industry”

– IPRF research project, “Traffic Management Studies for Reconstruction of High Volume Roadways”


Institute

Texas

Application - TF A5T60• Accelerated Construction Technology

Team (ACTT)• Corridor review• “Outside” experts visit state experts• Share, learn, and promote new ideas

• Two-day workshop with Indiana and Penn DOTs

• Proposed use of innovation in twelve areas

• Ultimately - DOT decides what is best for their project


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Texas

Application - Twelve Areas• Corridor

improvements• Contracting and

procurement techniques

• Work zone traffic management

• Stay out techniques

• Constructibility• Geotechnology

• Utility delays• Prefab/modular• High speed QA/QC• Workforce health

and safety• Training and

education• Communications

of best practices


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Texas

Application - IPRF Project• Task 6 Conceptual Study• Workshops with DOT• Late in programming/early in design• Brainstorm traffic and construction

issues• Recommend feasible alternatives• Current studies

– Mississippi DOT - I-55 South of Memphis

– Washington DOT - I-5 through Seattle


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Texas

Lessons Learned

• Do not “set” design basis too early

• Team approach enhances TCP development

• Early involvement of traffic and construction expertise helps identify possible problems and solutions


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Texas

Conclusions

• DOTs should be encouraged to follow concepts throughout TCP development

• Constructibility reviews integral to TCP development

• Team approach essential especially on larger projects


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Texas

Thank you!

Discussion?

Date post:	13-Jan-2016
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Materials, Pavements & Transportation Operations CONCEPTS FOR ENHANCING THE EFFECTIVENESS OF TRAFFIC...

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