APL 2015 is a longitudinal evenness data processing software package.

Processing of longitudinal evenness data

APL 2015 is a software package for processing data that are collected by a longitudinal evenness condition survey device (APL, MLPL, Unibox). The purchase of this software package is independent of the acquisition of condition survey equipment.

APL 2015, which complies with the 2015 Technical Note and the 2014 Uni Guide, is available under several licenses; they depend on the measurement equipment used:

– APL2015 License – APL Data

– APL2015 License – MLPL Data

– APL2015 License – Unibox Data

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Depending on the condition survey speed and on the equipment, different operations are possible:

– Check according to the Technical Note DEVT1521100N of 30 Sept 2015

– Check according to the 2014 Uni Guide “Longitudinal Evenness – State of the art and IDRRIM CEREMA recommendations”

– Check of intermediate courses

– NBO Expert Evaluation (Notes by Bandes Ondes)

– CP Expert Evaluation (Coefficient of flatness)

– PSD (Power Spectral Density) Expert Evaluation

– IRI (International Roughness Index) Expert Evaluation

– IRL (Longitudinal Reshaping Index) Expert Evaluation

-Rolling Expert Evaluation

– QSPO Expert Evaluation

– sliding SW Energy Expert Evaluation

– sliding SW Energy Expert Evaluation

– sliding LW Energies Expert Evaluation
3D sliding PSD Expert Evaluation
3D sliding PSD Expert Evaluation

– IIR Filtering Expert Evaluation

APL 2015 also performs the checks listed in APL 2000:
NBO 200 check (motorways)

– Check 2000-36

– Wearing course check (except 2000-36)

Limits of use

The APL2015 – Unibox data license should not be used to perform evenness checks during the acceptance of works, according to the GNCDS note, issued in 2019.