IRI Performance Models for Flexible Pavements in Two-Lane Roads until First Maintenance and/or Rehabilitation Work

摘要: Pavement performance models play a vital role in any pavement management system. The Regional Government of Biscay (RGB) (Spain) manages 1200 km road network and conducts data collections, including the International Roughness Index (IRI) values. aim paper is to develop an IRI model for two-lane roads with flexible until first maintenance and/or rehabilitation activity performed. Due huge amount available information, deterministic was selected. A literature review showed that, apart from age traffic volumes, structure key factor. Therefore, it decided analyze only stretches whose entire section known (surface layer + base subbase). Various variables related age, volumes employed materials were introduced as possible factors. multiple linear regression highest coefficient determination all significant included real cumulated heavy total thickness bituminous layers. As material surface could affect roughness progression, qualitative variable consider various materials. improved its accuracy, indicating that also influencing factor on evolution.