: American Rural Highways by Agg T R Thomas Radford - Roads United States Travel; Technology

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PREFACE vii

THE PURPOSE AND UTILITY OF HIGHWAYS

Transportation Problem--National in Scope--Development in Traffic--Location or Farm to Market Traffic--Farm to Farm Traffic--Inter-City Traffic--Inter-County and Inter-State Traffic--Rural Education--Rural Social Life--Good Roads and Commerce 1-12

HIGHWAY ADMINISTRATION

Township Administration--County Administration--State Administration--Federal Administration--Special Assessments--Zone Method of Assessing--General Taxation--Vehicle Taxes--Sinking Fund Bonds--Annuity Bonds--Serial Bonds--Comparison of Methods of Issuing Bonds--Desirability of Road Bonds 13-28

DRAINAGE OF ROADS

The Necessity for Drainage--Importance of Design--Surface Drainage--Run-off--Ordinary Design of Ditches--Underground Water--Tile Drains--Lying Tile--Culverts--Length of Culvert-- Farm Entrance Culverts--Metal Pipe--Clay and Cement Concrete Pipe--Concrete Pipe--Endwalls for Culverts--Reinforced Concrete Box Culverts--Drop Inlet Culverts 29-41

ROAD DESIGN

Necessity for Planning--Road Plans--Problems of Design-- Preliminary Investigations--Road Surveys--Alignment-- Intersections--Superelevation--Tractive Resistance--Rolling Resistance--Internal Resistance--Air Resistance--Effect of Trades--Energy Loss on Account of Grades--Undulating Roads-- Guard Railing--Width of Roadway--Cross Section--Control of Erosion--Private Entrances--AEsthetics 42-62

EARTH ROADS

Variations in Soils--Variation in Rainfall--Cross Sections Elevating Grader--Maney Grader--Slip Scraper--Fresno Scraper--Elevating Grader Work--Use of Blade Grader-- Costs--Maintenance--Value of Earth Roads 63-73

SAND-CLAY AND GRAVEL ROADS

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