The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been qmore of an art than a scienceq and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.The roughness of the surface contributes to additional tire wear and influences maintenance and repair expenses. ... Figure 18 from AASHTOa#39;S aquot;A Manual on User Benefit Analysis of Highway and Bus-Transit lmprovementsaquot; shows the impacts ... 100 cars x 365 days x $.10 added cost x1 mile : $3, 650 50 trucks x 365 days x $.11 added cost x 1 mile = $2, 008 User costs ... an operating cost of 280 per mile for an intermediate size passenger car traveling on average suburban pavement.
|Author||:||Ken Skorseth, Ali A. Selim|