Work Zone Safety Using Accelerated Bridge Construction (ABC)

Rukhsana Lindsey, UDOTPresented by Jim McMinimee

Principal Engineer, Applied Research Associates

Utah Small State

• 2.5 M people• $350 M Federal Program• DOT 1650 employees • Currently 6% unemployment statewide

Big Transportation Program• 250+ projects• $3+ B under construction

Our Need for Speed Customer driven culture Willing to take risks Implement new

technologies:• Accelerated Bridge Construction• Accelerate Pavement Construction• Diverging Diamond Interchanges

Increased partnerships

Department Themes Accelerate Delivery Decrease and Minimize Detours or

Delays Encourage Innovation that speeds project or

provides value Get a Good PriceBalance of good price vs other themes

New Business Model

• Societal Costs Minimized • Societal cost model includes safety costs• Lowest Construction Cost Lowest

Project Cost • Public Praise• Political Capital

I-15 Design Build a Case Study in Project Acceleration

I-15 Design Build – SEP 14• $1.6 B Contract• 17 Miles, 130 Bridges, 7 Urban/3 Interstate Interchanges• 10 Year Maintenance Period

Drivers for Project• Public Support – 4 Years Instead of 9 Years• 2002 Winter Olympics

I – 15 Incentives• Quality, Project Management, MOT, Early Completion• Potential $50M

Post Mortem User Cost Study UofU Dr Martin• USER COSTS SAVED > $500M• Saved estimated 4400+ accidents over Traditional• 14 Lives Saved

What is ABC? Innovative methods to decrease

bridge construction time Build elements offsite/outside traffic

area Transport to site and install rapidly

Benefits of ABC Minimized traffic disruption – from

months to days Improved work zone safety – improved

worker safety Improved product quality – controlled

environment, cure times, easier access, etc.

Innovative Technology

• First implementation costs more• Potential for new methods to cost less• Promise of time savings• Positive cost-benefit ratios• Promise of cost savings

Utah Precast Deck Panel Projects

Family of Innovative ABC Elements and Methods

Precast Concrete Elements

Modular Construction

Structure PlacementMethods

Innovative Accelerated

Bridge Construction

Accelerated Geotech

Work

Fast Track Contracting

Benefits of ABC

Minimizes traffic disruption from months to days Improves work zone and worker safety User savings Improves product quality

• Controlled environment• Cure times• Easier access

Utah ABC Costs18 projects $45M

I-215; 4500 South I-80; State St. to 1300 East

I-80; Mt. Delle to Lambs Canyon

3300 South over I-215 I-15; Widening, 500 North to I-215

Pioneer Crossing$0

$5,000,000

$10,000,000

$15,000,000

$20,000,000

$25,000,000

$30,000,000

User Savings Valued Added

Animation

Media Support

UDOT ABC HistoryABC Element Projects Bridges

Self Propelled Modular Transporters (SPMT) 8 17Half Thickness Deck Panels 5 74Full Depth Deck Precast Deck Panels 15 21Precast Voided Slabs 1 2Approach Slab Panels 10 15Precast Sleeper Slabs 12 19Precast Abutments 3 5Precast Bent Caps 2 2Precast Deck – Slide-in Technique 3 5Precast Box Culvert 3 7Heavy Lift Cranes 3 4

ProjectsI-84 Riverdale Road; Lego Bridge

Projects800 North; Precast Deck Panels

Projects4500 South over I-215; SPMT

ProjectsEagle Canyon Bridge; Precast Deck Panels

2009 Slide ins

2009 Slide ins

ProjectsEcho Canyon Bridge; Slide-in

UDOT Research Study

Reviewing status of ABC Program 161 ABC projects Started with SPMT projects

18 Accelerated Bridge Projects- SPMTs• Traffic impacts Closures and Detours of 2-3 days• Channelizing work zones of usual durations• Zero crashes within work zone(!)• Bridge built away from traffic with better

worker safety and productivity.• One statistical surprise – Slightly more accidents after

construction over.

Preliminary Results

Public Support for ABC

3; 1.40% 4; 1.40% 5; 2.80%

6; 18.30%

7; 76.10%

1 2 3 4 5 6 7

Public Overall Satisfaction With Project Results(1 = not satisfied, 7 = very satisfied)

Questions?