01043823

Component

https://doi.org/10.3141/2016-07

http://scholar.google.com...bati&publication_year=2007

Twenty gravel road study sections at 10 sites in north-central Wyoming were monitored from September 2005 through June 2006. Windshield or mobile, visual survey ratings of the sections and field measurements were taken weekly. Surfacing gravel samples were collected, and their gradations were determined. Traffic speeds and volumes by class were collected with a two-tube system. (A two-tube system counts traffic by receiving signals from two tubes placed 8 ft apart across the road. By a comparison of the times at which signals are received from each tube, the speed of the traffic can be determined, as can the number and spacing of axles.) Statistical analyses generated regression models that allowed the prediction of the service life of an unmaintained gravel road. Traffic speeds, traffic volumes, and surfacing gravel properties were shown to have the greatest influence on gravel roads’ deterioration rates. For these typical Wyoming county roads with good geometry, good drainage, and adequate gravel thicknesses, the typical failure mode was shown to be either potholes or washboards (corrugations). The typical life of gravel roads without maintenance was shown to be in the range of several months to 1 year. Climatic effects were shown to be related to precipitation more than seasonality, at least in Wyoming’s dry–freeze climate.

01084477

English

pp 56-64

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104432

Print

Figures (4) ; Photos (4) ; References (6) ; Tables (5)

Aggregate gradation; Climate; Corrugations (Defects); Deterioration; Drainage; Gravel roads; Pavement maintenance; Potholes; Regression analysis; Service life; Surface course (Pavements); Thickness; Traffic speed; Traffic volume

Wyoming

Data and Information Technology; Design; Highways; Hydraulics and Hydrology; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB, ATRI

Feb 8 2007 5:31PM

• Assessment of Debonding in Concrete Slabs Using Seismic Methods
• Elastic Nonlinear Finite Element Analysis of a Flexible Pavement Subjected to Varying Falling Weight Deflectometer Loads
• Evaluating the Light Falling Weight Deflectometer Device for In Situ Measurement of Elastic Modulus of Pavement Layers
• Genetic Algorithms–Based Network Optimization System with Multiple Objectives
• Ground Proving Three Seismic Refraction Tomography Programs
• Initial Findings on Skid Resistance of Unpaved Roads
• Mechanistic Classification of Unbound Materials
• Monod Kinetics for Aerobic Biodegradation of Calcium Magnesium Acetate: Soil Microcosms from a Highway Shoulder
• New Approach for Estimating Rock Slope Stability Using Logistic Regression Analysis
• Permanent Deformation and Critical Stress of Cohesive Soil Under Repeated Loading
• Rockfill Embankment Settlement: Sugarloaf Mountain Bridge Abutment and Hoover Dam Bypass (US-93)
• Two-Step Fracture Mechanics–Based Approach to Assess Early-Age Delamination Distress