Preliminary Work To Introduce The Weighted Longitudinal Profile Into Pavement Management Systems

Roland Spielhofer (Vortragende:r)

Publikation: Beitrag in Buch oder TagungsbandVortrag mit Beitrag in TagungsbandBegutachtung


The weighted longitudinal profile (WLP) is a recent approach to characterize evenness of roads. This paper focuses on the development of an evaluation scheme for motorways derived from the power spectral density of the profile. When the evaluation scheme is established, the derived limits are verified. Different surface types (asphalt, concrete) and the influence of their typical evenness characteristic on the evaluation by the WLP are investigated. The WLP shows to be capable to clearly bring out these characteristics without introducing a bias into the evaluation. Motorway networks in Germany and Austria (data from first and second lane) are evaluated then. A user panel rating shows a distinct correlation between WLP and user perception. In comparison to the IRI (currently in use in Austria), the WLP shows a lot more differentiation between good and bad sections. A comparison of WLP and the planograph in the frame of new work approval of motorway sections in Austria is drawn, but further research is necessary to get a conclusive picture of a possible change in the new work approval regulations. Furthermore, the Austrian motorway ramps and intersections are evaluated. An adaptation of the evaluation scheme is proposed to take into account the different driving speed on ramps and hence lower requirements regarding evenness. 1 INTRODUCTION Longitudinal unevenness of roads has an impact on the durability of roads - unevenness increases dynamic wheel loads - and on the user experience while driving (i.e. riding comfort). In the last decades, several approaches have been taken to evaluate the evenness. Different indices have been developed (like the IRI [Sayers 1986], the NBO [Delanne 2000] and many others). All of these indices have its strengths and weaknesses. The weighted longitudinal profile (WLP) [Ueckermann 2008], developed in Germany, is the most recent approach to adequately characterize the longitudinal profile of a road. While developing this index, the following requirements have been kept in mind:  Evenness evaluation independent of driving speed.  The ability to distinguish between single irregularities, general unevenness and periodic unevenness.  Optimal localization of evenness problem.  Easy to understand parameters. How and if these requirements were satisfied has been described in [Maurer 2008]. The paper focused
TitelThe 4th European Pavement and Asset Management Conference
Redakteure/-innenKent Gustafson
PublikationsstatusVeröffentlicht - 2012
Veranstaltung4th European Pavement and Asset Management Conference -
Dauer: 5 Sept. 20127 Sept. 2012


Konferenz4th European Pavement and Asset Management Conference

Research Field

  • Ehemaliges Research Field - Mobility Systems


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