Indiana High Value Research

Tommy NantungINDOT Research and Development

Treatment Guidelines for Pavement Preservation

Objectives To provide treatment guidelines for

the INDOT pavement preservation program

To develop INDOT’s pavement distress identification manual, in order to provide consistent, precise, uniform decision-making regarding treatment type selection

To develop training materials on the use of the distress identification manual and treatment guidelines in order to improve the skill level of the personnel involved in the P.P.P.

Treatment Guidelines for Pavement Preservation

Problem Solved Synchronizing Program

Between in-house maintenance activities and contract work performed as part of the district’s pavement program

Assisting Districts The district level

preservation treatment practices.

Benefit/Production Manuals

Helps to enhance the overall construction quality of INDOT treatments to their maximum benefit and efficiency.

Training Materials To make one set of

training materials suitable for Indiana.

Railroad Interconnect at Signalized Intersections

Motivations Fox River Grove, IL

October 25, 1995 Track Clearing Green

Active 2-4 seconds Before Bus/Train Collision

7 Students Killed 24 injured

4

BUS

CHASSIS

~36’

Railroad Interconnect at Signalized Intersections

Objectives: A performance measure

for determining the effectiveness of railroad preemption adjacent to signalized intersections to improve safety.

Engage the traffic signal control vendors as partners in the process to facilitate implementation.

Share findings with other agencies.

Benefits Improved preemption

strategies were implemented at an intersection that had occasional queuing problems (~2% of preempted cycles).

In the nearly 1000 cycles observed, the performance measures demonstrated the problems had been eliminated.

Saw-Cut Guidelines for Concrete Pavements

Objective: Reduce costs

of replacing a cracked pavement or joint repair

Reduce risk for raveling and cracking

Provide guidance on when to saw-cut and how deep to saw cut to reduce the risk of micro-cracking and random cracking

Saw-Cut Guidelines for Concrete Pavements

Simulations enable ‘what if’ scenarios – temperature, timing, humidity, depth

Contractors get a better feel from ‘what ifs’

Maturity based rules versus rules of thumb

Spec changes to reduce the potential for ‘chase cracking’

Improving the Design ofU-Beams for Indiana

Objectives Improve efficiency Optimize design

Solutions Live load distribution Bridge deck design Shear strength Influence of debonding

Improving the Design ofU-Beams for Indiana

Benefits: More economical

utilization of U-Beams Improved safety Improved

understanding of shear strength and debonding

Applicable to all prestressed girders

High Performance Concrete Bridge Decks

Improve bridge deck performance

Transverse crack control Shrinkage Permeability

Problems Solved Low-shrinkage concrete Improved reinforcing

details

Significantly Improved Cracking Performance

High Performance Concrete Bridge Decks

Reduced costs Maintenance (eliminate

overlay in lifecycle) Deck replacement

(extended by ~15 years)

Increase lifespan Deck Structure

Road Safety Investigation Tools (RSIT)

Goal: Improve effectiveness

and efficiency of safety audits of existing roads

Objectives: Identify the existing

knowledge of effective safety countermeasures

Develop a tool that helps apply the existing knowledge to safety audits

Road Safety Investigation Tools (RSIT)

Benefits: Reduced time on safety

audits Increased quality of the

safety audit outcome RSIT-identified safety

countermeasures RSIT-generated report

with full documentation Learning opportunity for

less experienced investigators