Superelevation: The transverse inclination throughout the length of horizontal curve by raising outer edge counteract w.r.t. inner edge, in order to counteract the effect of centrifugal force is known as superelevation (or cant or banking). Note: This topic is part of the second chapter of Highway Engineering. I suggest reading this topic in the context
Superelevation & Analysis for Expression of Superelevation 2.15 Read More »
Stability Analysis on Horizontal Curve without Superelevation: It is the curve in plane to provide change in the direction to Central line on the road. When a vehicle travel on a horizontal curve, the centrifugal force act horizontally outward through the center of gravity of the vehicle. Note: This topic is part of the second
Stability Analysis on Horizontal Curve without Superelevation 2.14 Read More »
Design of Horizontal Alignment: Various design element to be considered in the horizontal alignment are: Design speed Type and length of transition curve Width of pavement Super elevation Radius of circular curve Set back distance Note: This topic is part of the second chapter of Highway Engineering. I suggest reading this topic in the context
Design of Horizontal Alignment & Design Speed 2.13 Read More »
Curve: Curves are provided in highways in order that the change of direction at the intersection of straight alignments either in horizontal or vertical plane, shall be gradual. Note: This topic is part of the second chapter of Highway Engineering. I suggest reading this topic in the context of the complete chapter: Geometric Design of
Curve, Type of Curves & Advantages of Curves 2.12 Read More »
Intermediate sight distance (ISD): On a horizontal curve, the requirement of overtaking sight distance can not always be satisfied. In such cases overtaking is prohibited by using regulatory signs. To provide an opportunity for overtaking operation on horizontal curves or in restricted areas, we provide intermediate sight distance, i.e. equals to twice of stopping sight
Intermediate Sight Distance And Sight Distance At Intersections 2.11 Read More »
Overtaking Sight Distance (OSD): Note: This topic is part of the second chapter of Highway Engineering. I suggest reading this topic in the context of the complete chapter: Geometric Design of Highway. If you want to read the entire Highway Engineering, click here: Highway Engineering. If all the vehicle ply on the road at the
Stopping Sight Distance (SSD): The minimum distance visible to a driver ahead to safety stop a vehicle travelling at design speed without collision with any other obstruction is termed as “SSD”. It is also termed as “Absolute Minimum Sight Distance” or ” Non-Passing Sight Passing”. Note: This topic is part of the second chapter of
Sight Distance: Sight distance is the length of road visual a head to the driver at any distance. ( it is considered by taking the height of eyes of the driver to be 1.2 m and height of object to be 0.15 m). Note: This topic is part of the second chapter of Highway Engineering.
Sight Distance And Following Factors Of Sight Distance 2.8 Read More »
Roadway / Width of Formation: It is the sum of with pavement or carriageway including separator (if any) and the shoulder. Roadways width is the top of highway embankment or bottom width of highway cutting excluding the side drain. Width of Formation of various class of Road are as follows: Note: This topic is part
Roadway / Width of Formation & Right of Way / Road Land 2.7 Read More »
Shoulder: Extra width provided adjacent to edge of pavement is called shoulder. It is provided for emergency point of view like Breakdown of vehicle, medical emergency etc. Note: This topic is part of the second chapter of Highway Engineering. I suggest reading this topic in the context of the complete chapter: Geometric Design of Highway.
Divider /Medians / Traffic separators Divider is an element provided to Road along the center line to separate two way traffic. The main function of median is to prevent “Head on collision” between vehicles moving in the opposite direction. it also serves following other functions: To channelize traffic into the streams. To protect the pedestrians.
Divider /Medians / Traffic separators And Kerb 2.5 Read More »
Camber / Cross- Slope: Note: This topic is part of the second chapter of Highway Engineering. I suggest reading this topic in the context of the complete chapter: Geometric Design of Highway. If you want to read the entire Highway Engineering, click here: Highway Engineering. It is the slope provide to the road surface in
Camber / Cross- Slope & Width of Pavement or Carriageway 2.4 Read More »
Pavement surface characteristic Pavement surface characteristic depends upon pavement type. Which in turn depends on availability of material, cost, composition of traffic, climate conditions, method of construction available.Pavement surface characteristics include: Note: This topic is part of the second chapter of Highway Engineering. I suggest reading this topic in the context of the complete chapter:
Elements Of Highway Geometric Design: In Geometric design of highway deals with following elements like Cross-section element, Sight distance, Horizontal alignment details, Vertical alignment details, Intersection details. Note: This topic is part of the second chapter of Highway Engineering. I suggest reading this topic in the context of the complete chapter: Geometric Design of Highway.
Elements Of Highway Geometric Design & Cross-Section Elements 2.2 Read More »
Geometric Design of Highway Geometric Design of a highway deals with all the dimensions and layout of visual features of a highway such that it provides maximum efficiency and minimum cost and reasonable safety. Geometric Design of a highway depends on several design factors: Cross-section Element Sight Distance Horizontal Alignment Details Vertical Alignment Details Intersection
Geometric Design Of Highway- Highway Engineering (Chapter 2) Read More »
The process of conveyance from one point to another is termed transportation. In this article, we elaborate on the first chapter of Highway Engineering in detail.
Liquid limit of inorganic soil not of volcanic organic rarely has a value greater 100 %. Organic soil has a generally high value of liquid limit (liquid limit>50%) but their plastic limit is also comparatively high, hence their plastic index values are not as high as its liquid limit.
Difference Between Organic and Inorganic Soils | Properties of Soil | Soil Mechanics Read More »
The soil which shows a large decrease in its volume due to an increase in its water content without any increase in external pressure or load is termed as collapsible soil. Ex- Loess soil, Sand Dunes, Fine sand & Silt silty cemented due to the presence of calcium. And the properties of collapsible soil is called collapsibility.
Collapsibility | Properties of Soil | Soil Mechanics Read More »
Sensitivity is defined as the ratio of Unconfined Compressive Strength in an undisturbed natural state to Unconfined Compressive Strength of soil in the remolded state.
Sensitivity, Thixotropy & Activity | Properties of Soil | Soil Mechanics Read More »
Consistency Index is defined as the ration of the difference of liquid limit and natural water content to the plasticity index. Toughness Index is a ratio of IP & IF.
