Indiana High Value Research Tommy Nantung INDOT 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

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 of U-Beams for Indiana Objectives Improve efficiency Optimize design Solutions Live load distribution Bridge deck design Shear strength Influence of debonding

Improving the Design of U-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