Utilization of traffic speed deflectometer for pavement structural evaluations

[Display omitted] Traffic Speed Deflectometer (TSD) is primarily capable of evaluating the pavement conditions at the network level with regard to the structural capacities. This paper mainly reviews the utilization of TSD for the pavement structural evaluations. With the Doppler lasers configured i...

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Bibliographic Details
Published in:Measurement : journal of the International Measurement Confederation 2021-06, Vol.178, p.109326, Article 109326
Main Authors: Xiao, Feipeng, Xiang, Qian, Hou, Xiangdao, Amirkhanian, Serji N.
Format: Article
Language:English
Subjects:
Deflection
Layer moduli
Pavement structural evaluations
Structural capacity
Traffic speed deflectometer
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Summary:[Display omitted] Traffic Speed Deflectometer (TSD) is primarily capable of evaluating the pavement conditions at the network level with regard to the structural capacities. This paper mainly reviews the utilization of TSD for the pavement structural evaluations. With the Doppler lasers configured in a specific truck, TSD can measure the deflection velocity (slope) at a traffic speed. The measured deflection can be calculated by either area under the curve (AUTC) method or Euler–Bernoulli beam (EB) method. Moreover, the pavement moduli backcalculated by either 3D Move simulation or the Artificial Neural Networks (ANNs) from TSD measurements tend to well correlate those backcalculated from FWD measurements. It is noted that structural capacities derived from TSD measurement were reliable in assessing the pavement conditions. Additionally, the pavement roughness has a significant effect on TSD measurements. Therefore, Traffic Speed Deflectometer has a promising applied prospect in pavement structural evaluations.
ISSN:0263-2241
1873-412X
DOI:10.1016/j.measurement.2021.109326