Highway Pavement: Layers, Functions, Types, Defects, Rigid and Flexible Pavements! Pavement design, in general, consists of determining the thickness of the pavement or of the several layers of which it is composed in order to resist the wheel loads of the traffic and transmit them safely on to the foundation soil. Thus, the strength of the pavement must be adequate [...]
The design of rigid pavements involves the design of the thickness of the cement concrete slab comprising the rigid pavement, since the pavement derives its structural strength primarily through the flexural strength of the slab. Except for low traffic volumes and street roads, reinforced cement concrete (RCC) slabs are used as rigid pavements. In addition to the design of thickness, [...]
Design of pavements has been based on experience and judgment in the past. But the design methodology has taken rapid strides towards rationality in the past few decades based on an understanding of the stresses and strains in the layers constituting the pavement and application of the concept of reliability in achieving the desired level of service during the pavement's [...]
In this article we will discuss about how to stabilise soil for road construction. Learn about:- 1. Mechanical Stabilization 2. Stabilisation with Additives. 1. Mechanical Stabilization: Rearrangement of the soil grains and densification by compaction is the first approach. The other approach consists of blending two or more available soils to obtain the desired gradation of soil particles for the [...]
Highway Drainage: Need and Types of Highway Drainage System! Highway drainage consists of removing or controlling surface water and subsurface water away from the road surface and the subgrade supporting it. Part of the rain water flows on the ground or road surface, while the other part percolates into the ground and reaches the ground water table, raising its level. [...]
In this article we will discuss about:- 1. Alignment of Hill Roads 2. Geometric Design Aspects of Hill Roads 3. Maintenance Aspects. Alignment of Hill Roads: 1. Administrative, developmental and strategic needs would determine the obligatory points to be connected by a hill road. Control points would be governed by saddles, passes, river crossings, and other natural features such as [...]
In this article we will discuss about how to maintain roads. Maintenance of Highway: A well-constructed highway that is designed for a particular category would need minimum maintenance. The nature and extent of maintenance needed would depend on the degree of deterioration of the pavement, the most common road characteristic used to assess this being the 'roughness'. It is generally [...]
Highway Pavements: Design, Types, Flexible and Rigid Pavement, notes and Functions . Also Learn about:- 1. Design of Highway Pavements 2. Pavement Evaluation 3. Strengthening. Design of Highway Pavements: Pavement design is governed by a number of considerations/factors, as given below: 1. Design Life of the Pavement: 'Design period' or 'design life' of a pavement is the period of time [...]
Highway Lighting or Roadway Lighting [Standard Codes]. Highway lighting consists of providing illumination through lights in the vicinity of a highway/road/street. It plays a major part in ensuring of highway safety during night driving and includes the aspect of roadside amenities for the convenience of the road-users, and preserving the aesthetics of the highway and its vicinity during the nights. [...]
A good highway network provides several benefits to the general public and the society at large. However, any new highway project, or improvements to an existing highway for meeting increased traffic demands should be justified from the economic point of view. That is to say, an analysis of the economic cost - the initial cost and maintenance cost over the [...]