DR O.S ABIOLADEPARTMENT OF CIVIL ENGINEERING

UNIVERSITY OF AGRICULTURE, ABEOKUTA

CVE 409HIGHWAY ENGINEERING

INTRODUCTION Teaching approach & Grading PolicyCOURSE OUTLINEHighway Geometric DesignRoute LocationSoil and Bituminous material Traffic Engineering

HIGHWAY GEOMETRIC DESIGNFactors Influencing Highway DesignHighway design is based on several design

standards & controls, Which depend on;Functional classificationExpected traffic volume and vehicle mixDesign speedDesign of the Alignment Horizontal alignmentVertical alignmentSuper-elevation

Route LocationTechniques for Highway surveysGround surveysRemote sensing Principles of Highway locationOffice study: engineering, topography, geology etc.Reconnaissance : is to identify several feasible

routesPreliminary location survey are used to evaluate the

economic & environmental feasibility of the alternatives routes

Final location surveyPreparation of highway plans

Soil Properties Soil Characteristics: Origin & formation of soilsSurface textureBasic Engineering properties of soilAtterberg limitsPermeabilityShear strengthClassification of soils for Highway use-

AASHTO; USCSSoil Tests for pavement design-

Compaction,CBR

Bituminous materialsDescription and Uses of bituminous binders-

Asphalt cements; SC; RC asphalts, Asphalt emulsionProperties of asphaltic materialsConsistencyDurabilityRate of curingResistance to water actionTests for asphaltic materials-consistency test;

penetration testAsphaltic concrete is a uniformly mixed

combination of bitumen, coarse, fine aggregates & fillers

Traffic EngineeringSpot speed studies- are conducted to estimate

the distribution of speeds of vehicle in a stream of traffic at a particular location on a highway

Speed characteristicsLocations of spot speed studiesMethods for conducting spot speed studiesPresentation and Analysis of Spot speed dataHeadway- space mean & time meanTraffic Volume- Different types of traffic counts

are carried out, depending on the anticipated use of the data to be collected e.g ADT. AADT

Origin-Destination Study

CLASS WORK PROJECT