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State of the Practice - Traffic Speed Deflectometer for Pavement Management and Design

  • Mar 5, 2019 (2:00 - 3:30 pm CT; 1:00 - 2:30 pm MT)
    Webinar (desktop or laptop access)


DEADLINE: Thursday, February 28, 2019


This presentation will cover developments and applications of the Traffic Speed Deflectometer (TSD) technology within the U.S. TSD gives transportation agencies the capability of collecting pavement structural data at a network level along with a level of detail beyond what has been previously available for project-level design, safely without lane closures and traffic interference. When combined with GPR, the TSD data can provide both stiffness and thickness of individual pavement layers at 10-meter intervals while traveling at the posted speed limit. Examples of correlation studies presented will show TSD comparisons with conventional Falling Weight Deflectometer (FWD) data. The Idaho network data collection process will be highlighted, along with an overview of the publicly available (GIS) referenced output. The project provided network and design level data for identifying layer thickness, strength and remaining life. In addition, the methodology of validating data elements and calculating layer strength and remaining pavement life are to be covered.


Ken Maser, Ph.D., PE, is the founder of Infrasense, Inc. Maser is an internationally recognized authority in the field of non-destructive evaluation and subsurface condition investigations. He has experience ranging from managing network-level pavement and bridge deck evaluations to serving as a consultant to the Strategic Highway Research Program (SHRP).

Peter Schmalzer, PE, is an Associate Engineer with Nichols Consulting Engineers, Inc. He has dedicated his career to the evaluation, design and construction of highway, airfield and industrial pavements, with an especial focus on the collection and analysis of deflection data.

Target Audience

Pavement designers, asset management staff, project programmers, materials and research staff, consultants, road and street managers, etc.

More Info

The above resource and more can be accessed by visiting the TLN Learning Management System (LMS).

515 ½ E BroadwaySuite 101Bismarck, ND 58501