01124852

Component

https://doi.org/10.3141/2101-01

http://scholar.google.com...rera&publication_year=2009

The condition of unpaved roads is commonly assessed by using qualitative distress measures. Some methods do not consistently consider the relative effect of multiple defects on road condition, or their application is limited to the conditions under which they were developed. In 2007, the Ministerio de Obras Públicas of Chile and a private consultant developed the Modelos de Deterioro de Caminos No Pavimentados study. The scope of the study was to gain experience with and understanding of unpaved road behavior. The main goal of the study was to develop and validate a method for evaluating unpaved road condition by using objective measures of distress, drainage, and profile characteristics. The scope was to design a versatile tool that was applicable to any location, followed a simple procedure, and used cost-effective survey techniques. The proposed approach is to define condition models from a questionnaire administered to a professional panel by applying the Delphi method. As a result of the study, equations representing the unpaved condition index (UPCI) and condition limits were developed for unbound gravel, stabilized gravel, and earth roads subject to three climates: dry, Mediterranean, and humid. UPCI equations and condition limits were validated successfully; the method to assess unpaved road conditions was reliable and versatile.

01139462

09-2548

English

pp 3-9

2009

Transportation Research Record: Journal of the Transportation Research Board

9780309126175

Print

Figures (3) ; References (11) ; Tables (5)

Condition surveys; Delphi method; Earth roads; Equations; Gravel roads; Mathematical models; Pavement distress; Pavement management systems; Unpaved roads; Validation

Chile

Geotechnology; Highways; Pavements; I23: Properties of Road Surfaces; I42: Soil Mechanics

PRP, TRIS, TRB, ATRI

Jan 30 2009 6:54PM

• Effect of Exopolymers on the Liquid Limit of Clays and Its Engineering Implications
• Effect of Suction on Resilient Modulus of Compacted Fine-Grained Subgrade Soils
• Estimation of Subgrade Resilient Modulus for Virginia Soil
• Functional Characteristics of Double Draining Layer Flexible Pavements
• Influence of Soil Suction on Small-Strain Stiffness of Compacted Residual Subgrade Soil
• Inverse Analysis of Plate Load Tests to Assess Subgrade Resilient Modulus
• Matric Suction Prediction Model in New AASHTO Mechanistic–Empirical Pavement Design Guide
• Method for Assessing Heavy Traffic Impacts on Gravel Roads Serving Oil- and Gas-Drilling Operations
• Roughness of Unpaved Roads: Estimation and Use as an Intervention Threshold
• Three-Point Imaging Test for AASHTO Soil Classification
• Use of Structural Asset Management to Evaluate Road Substructure Drainage Systems
• Variations of Resilient Modulus of Subgrade Soils with Postcompaction Moisture Contents