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:- 1. Traffic Volume Studies 2. Traffic Flow Characteristics 3. Traffic Forecasting. Traffic Volume Studies: Systematic traffic surveys, traffic studies, and their scientific analysis are essential in traffic engineering and find wide application in planning for future needs of roads, improvement of existing facilities, geometric design aspects, pavement design, and traffic regulation and control. [...]
In this article we will discuss about:- 1. Definition of Highway Capacity 2. Importance of the Concept of Highway Capacity 3. Factors Affecting Capacity and Level of Service 4. Traffic Capacity Formula. Definition of Highway Capacity: Highway capacity is associated with traffic volume and traffic density. Traffic volume is the number of vehicles passing a given point on a roadway [...]
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 [...]
Highway economic analysis, also known as highway project appraisal, involves quantification of the costs of and benefits from a scheme over a selected time horizon and evaluation by a common yardstick. The technique is also known as benefit-cost analysis. Such economic evaluation serves a number of purposes: (i) To rank different schemes within the highway sector. (ii) To assist in [...]
In this article we will discuss about how to design plain jointed rigid pavements for highways by IRC Method. IRC Method of Rigid Pavement Design: This method is based on mechanistic-empirical principles and the use of software IITRIGID for the computation of flexural stresses due to single and tandem axle loads. The design of a rigid pavement consists of: (i) [...]
Concrete Roads: PQC, Methods of Construction and How it is Made! Introduction to Concrete Roads: Concrete roads fall under the category of high quality/superior type of roads built with cement concrete. These pavements may or may not be provided with sub-base/base courses, and they may be constructed directly over a well-compacted soil subgrade. They derive their strength to support the [...]
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 [...]