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Feb 26, 2016 / Haseeb Jamal -

5 Travel Myths You Need to Stop Believing Right Now

Feb 26, 2016 / Haseeb Jamal -

Canal Comes Alive with Lighted Boat Parade.

Components of Road Structure

1. Subgrade is the foundation of the road, thus its the lowest and most important component of road structure. 2. SUB BASE Consists of a. Upper Base Courseb. Sub or Lower Base Course... If natural surface is above the formation level then the surface is cut down to proposed sub grade surface If natural surface is below the formation level then the sub grade will be above the

Traffic Load - Definition and Analysis

This is the role of the Pavement Engineer and involves determining the loading on the road to be carried forward to the Pavement Design. The role of the pavement engineer is to provide an adequate thickness of pavement to carry the expected loads without deterioration of the network during the design life. The estimated or projected magnitude and occurrence of

Highway Drainage Design, Structures and Guidelines

Includes collecting, transporting, and disposing of surface/subsurface water originating on or near the highway right of way or flowing in streams crossing bordering that right of way. Drainage of highway is important because water damage highway structure in many ways. The water which are dangerous for highways are: Rainwater: Cause erosion on surface or may

Types of Pavements - Flexible Pavement / Rigid Pavement

Flexible pavements are those pavements which reflect the deformation of subgrade and the subsequent layers to the surface. Flexible, usually asphalt, is laid with no reinforcement or with a specialized fabric reinforcement that permits limited flow or re positioning of the roadbed under ground changes. The design of flexible pavement is based on load

Causes of Roadway/Highway Failure

Pavement considered flexible and the failure mechanism is assumed to be plastic deformation due to the communicative load over the life of pavement. Elastic Deformation: Temporary deforms the foundation material and compresses the air that fills the voids of the base and subgrade. In truly elastic deflection, permanent unevenness does not occur, even under repeated

Design & Construction of Culverts

An opening through an embankment for the conveyance of water by mean of pipe or an enclosed channel. Generally selection and type of material depends on the comparative cost, location of structure, availability of skilled labor, time limitations.

Typical Road Structure Cross Section Details

The design should be done so that to meet the above requirements for considerable number of years (need proper design and construction supervision). Pavement meeting all the requirements above have been product if six distinctly different construction processes as follows. Heat a viscous bituminous binder to make it fluid, then in a plant mix it with heated

Typical Cross Section of Highways Roadways

In meeting oncoming vehicle or passing slower ones, the portion selected by a driver depends primarily on the paved surfaced width of the highway. The width of the surfaced road and the no of lanes should are adequate to accommodate the type and volume of traffic anticipated and the assumed design speed of vehicles.

Geometric Design of Highways and Roads

The geometric design of highway includes the principle elements of highway alignment, x-sections and adjacent road side environment. The three dimensional physical location determined through calculation of horizontal and vertical alignment of highway centerline, based on variety of operational considerations results in the geometric design and represent all

Factors Affecting Selection of Highway Location

Traffic planner from various studies can predict the effect of travel patterns of alternative location proposed highway. Also they analyze the probable effect of new links in highway network. This permits the location engineer to determine how well alternative locations will fit with the existing network. Lanuse is a major factor affecting the pattern of traffic

Design & Functional Classification of Roads

A road network is composed of various types of roads, each of which performs a particular service in facilitating vehicular travel between points of trip origin and destination, and in providing access to property. Road classification is the orderly grouping of roads into systems according to the type and degree of service they provide to the public. Consideration for

Location Survey for Roads & Highways

The aim of location survey is to select a route with the following points kept in mind: 1. With reasonable economy it should meet the minimum requirement regarding curvature and grades. 2. To produce an easy riding (traveling), free flowing traffic artery that has a high capacity and it meets all the safety standards. 3. The location survey should recognize and evaluate the

Uses of Base Cross Drain

A subsurface drain, generally perpendicular to the roadway alignment, designed to drain infiltrated water. Often needed at bridge abutments, toll plazas, and across the road on long downgrades. The main purpose of the cross-drain is to channel water from above the path to the lower side. The source of the water may be from small streams, springs, mossy

AASHTO HL-93 Loading Highway Design

This is a hypothetical Live Load Model proposed by AASHTO for analysis of bridges. Reason for proposing this live load model is to prescribe a set of loads such that it produces extreme load effect approximately same as that produced by the exclusion vehicles.

Factors Affecting Stability of Road Pavements

The thickness of pavements depends on a number of variables, but from experience it has been found that the following factors affect the performance of pavements to a great extent. Traffic Factors, Soil Factors, Environmental Factors, Stress Distribution Factors.. Traffic is the most important factor in the pavement design. The key factors include contact pressure

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