Traffic Speed Deflectometer

Traffic Speed Deflectometer

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Caption: Traffic Speed Deflectometer (TSD) in use at the UK's Transport Research Laboratory's Crowthorne test track. This monitoring system was developed by TRL for the Highways Agency, which manages the road network in the UK. The Traffic Speed Deflectometer is being developed to improve on the deflectograph, a device used to measure the strength of the road surface that it is being transported over. The TSD uses lasers to make these measurements. Deflectographs have been used in the UK since the late 1960s. TRL have been developing the TSD since 2005.

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