– 2020 –

July 30, 2020, 11AM –

The Carbin App: Assessing Road Quality Using Crowdsourced Smartphone Measurements  – We propose, calibrate, and validate a crowdsourced approach for estimating road roughness power spectral density (PSD) based on an inverse analysis of measured vertical acceleration by a smartphone mounted in an unknown position in a vehicle. Built upon random vibration analysis of a half-car mechanistic model of roughness-induced pavement-vehicle interactions, the inverse analysis employs an L2 norm regularization to estimate, from the acceleration PSD, ride quality metrics, such as the widely-used international roughness index (IRI); as well as the half-car dynamic vehicle properties and related excess fuel consumption of the vehicle evoking the fluctuation-dissipation theorem of statistical physics. The method is validated against (1) laser-measured road roughness data for both inner city and highway road conditions, and (2) road roughness data for the state of California. We also show that road roughness predictions are only marginally affected by the phone position in the vehicle; an important condition for crowdsourced capabilities of the proposed approach. – Register Here

August 18, 2020, 1PM – Concrete Pavement Joint Design, Layout and Construction – Our very own Bill Cuerdon will present. ACPA NYS Chapter Members and government officials eligible for PDHs – Register Here

August 19, 2020, 2PM – TRB Webinar: Preserving Concrete Pavement – Register Here

September 14-16 – National Association of State Aviation Officials – Virtual Conference – https://nasao2020.com/

 

–2021 –

January 31-February 4 || TRB 100th Annual Meeting

Washington, D.C.