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This webinar was co-sponsored by ASCE's Transportation and Development Institute (T&DI) and ASCE Continuing Education

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Instructor:  Mostafa A. Elseifi, Ph.D., P.E., M.ASCE

Course Length: 1 Hour

Purpose and Background

Non-structural factors such as surface distresses and ride quality have been commonly used as the main indicators of in-service pavement conditions. In the last decade, the concept of implementing a structural condition index in Pavement Management System (PMS) to complement functional condition indices has become an important goal for many highway agencies. The Falling Weight Deflectometer (FWD) is widely used to assess the structural capacity of in-service pavements. However, the stop and go process necessitates traffic control to ensure drivers and workers’ safety, which limits the use of FWD at the network level.

Measuring pavement structural capacity at the network level can be achieved by using traffic-speed pavement deflection devices (TSDDs), which have become a promising development to assess the structural capacity of in-service pavements without causing major delays or lane closure. The Rolling Wheel Deflectometer (RWD) is one TSDD that has emerged in the last decade to measure pavement deflection while travelling at regular posted speed limits without causing users’ delay. The Danish Traffic Speed Deflectometer (TSD) has also been introduced in recent years to measure surface pavement deflection while travelling at traffic speed.

This webinar presents the most noteworthy research efforts and results to measure pavement structural capacity using TSDDs and to implement pavement structural capacity into PMS. It also presents a review and evaluation of the RWD and TSD, along with a detailed methodology on implementing the RWD test results into the Louisiana PMS as well as a proposed methodology to utilize continuous deflection testing measurements in overlay design. A cost efficiency of continuous deflection testing will be presented.

Primary Topics of Discussion

• Noteworthy research efforts and results to measure pavement structural capacity using TSDDs
• Implementing pavement structural capacity into PMS
• Review and evaluation of RWD and TSD
• Cost efficiency of continuous deflection

Learning Objectives

Upon completion of this course, you will be able to:

• Identify the available methods to measure surface deflection of in-service pavements
• Explain the benefits and limitations of continuous deflection testing
• Identify a method to implement continuous deflection testing into PMS
• Discuss a method to utilize continuous deflection testing in overlay design
• Assess the cost effectiveness of continuous deflection testing

Webinar Benefits

• Understand the benefits and limitations of continuous deflection testing
• Learn innovative methods to implement continuous deflection testing into PMS
• Avoid costly errors in applying function treatment on a structurally-deficient pavement
• Ensure the design of long-lasting pavements
• Minimize user delay through repetitive repair activities

Webinar Outline

• Problem definition
• Methods of pavement surface deflection measurements
• Falling Weight Deflectometer
• Rolling Wheel Deflectometer
• Traffic Speed Deflectometer
• Evaluation of continuous deflection testing methods
• Benefits of considering continuous deflection testing in decision-making process
• Methods to implement continuous deflection testing into PMS and overlay design
• Cost-effectiveness of RWD measurements
• Future directions

Assessment of Learning Outcomes

Students' achievement of the learning outcomes will be assessed via a short post-assessment (true-false, multiple choice and fill in the blank questions).

Intended Audience

• Highway engineers
• Consultants
• State employees in DOTs
• Researchers

How to Earn your CEUs/PDHs and Receive Your Certificate of Completion

To receive your certificate of completion, you will need to complete a short on-line post-test and receive a passing score of 70% or higher within 1 year of purchasing the course.

How do I convert CEUs to PDHs?

1.0 CEU = 10 PDHs [Example: 0.1 CEU = 1 PDH]