HIGWAY ENGINEERINGSession 05

Subject : S0012 / Introduction to Civil EngineeringYear : 2007

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Definition

Highway engineering is the branch of civil engineering

concerned with design of pavement structure, design of geometric alingment for safe highways and road.

Highway engineering became popular after the World War in 20th Century

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Scope of Work

• Pavement Engineering Design• Asphalt Testing Material• Geometric for Alignment

Design• Road Construction

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Pavement Engineering

Classification :1.Flexible Pavement2.Rigid Pavement3.Composite

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Flexible Pavement• Flexible pavements. Those which are surfaced with

bituminous / asphalt materials. These types of pavements are called "flexible" since the total pavement structure bends or deflects due to traffic loads. A flexible pavement structure is generally composed of several layers of materials which can accommodate this "flexing".

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Flexible PavementSurface

Base

Subbase

Subgrade

P ( Load )

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Rigid Pavement• Rigid pavements. Those which are surfaced with

portland cement concrete (PCC). These types of pavements are called

"rigid" because they are substantially stiffer than flexible pavements due to PCC's high stiffness.

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Rigid Pavement

Surface

Subbase or base

Subgrade

P ( Load )

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Rigid Pavement

JOINT

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Composite• Composite. Those which are surfaced with

portland cement concrete (PCC) and bituminous / asphalt materials as overlay construction

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Asphalt Testing material

Using for Testing asphalt material

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Geometric Design

Vertical and Horizontal Alignmentbasic geometric elements of road design, including: chainage, profile grades, vertical curves, circular and spiral curves, and superelevation.  

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Road Construction – flexible pavement

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Road Construction – rigid pavement

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Subjects

• Highway EngineeringLearn about :– Pavement design– Geometric Design– Material design & testing (for

Lab. activities )

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Projects

Brazil

USA

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Failure Construction

West Sumatra - EarthquakeNorwegia

Cracking Distress-USA

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Social and environmental effects • Community cohesion: Where highways are created

through existing communities, there can be reduced community cohesion and more difficult local access. Consequently property values have decreased in many cutoff neighborhoods, leading to decreased housing quality over time.

• Noise Pollution Highways generate more roadway noise thanarterial streets due to the higher operating speeds.

• Air Pollution issues Highways may contribute fewer emission than arterials carrying the same vehicle volumes.

• HOV ( high Occupancy vehicle ) lanes