Highway Engineering

Flexible pavements, commonly found on roads, experience various types of failures that impact their integrity and smoothness. Let's delve into three major types of failures and understand their causes, effects, and outcomes. Subgrade Failure Subgrade failure occurs when the soil beneath the flexible pavement undergoes excessive deformation, leading to undulations...

When it comes to road construction, understanding the difference between asphalt and bitumen is crucial. Some mistakenly assume they are synonymous, but technically, they're distinct components. Asphalt vs. Bitumen: Unraveling the Mix Asphalt is a blend of aggregates, binder (bitumen), and sand. The aggregates can vary from crushed rock to...

Roads are vital pathways that guide us to our destinations, whether by foot or land-compatible vehicles. In this exploration, we will delve into various road types, each playing a unique role in facilitating our daily travels. Types of Roads Roads are categorized based on several factors, shaping their purpose and...

Bitumen is a key ingredient in creating flexible pavement roads. It's a mixture of various organic materials such as vegetation, dead insects, and algae. Derived from petroleum through distillation, bitumen is composed of aromatic hydrocarbons and is typically found in a solid or semi-solid state, appearing black or brownish-black. Composition...

Road gradient refers to the slope of a road in relation to the horizontal plane. In simpler terms, it's the upward or downward inclination along the road's length, connecting points at different elevations. Upward and Downward Gradients When there's a rise concerning horizontal distance, it's called Upward Gradient (+n%), while...

In construction, a dowel bar might sound like a complex term, but it's essentially a short, smooth steel rod with a round shape. This unassuming rod serves a crucial purpose in connecting concrete slabs without hindering their side-to-side movement. Let's delve into the details of dowel bars, exploring their purpose,...

WBM roads, short for water-bound macadam roads, are a type of road construction named after John Macadam. These roads use simple materials like clean and crushed aggregates, screenings, and binding materials. Let's delve into the details of what makes up a WBM road. Components of WBM Roads WBM roads consist...

Hill roads present unique challenges when it comes to designing curves. There are three primary types of curves that engineers consider: 1. Hair-pin Curves: The Gentle Turn A hair-pin curve is like a gentle turn on a hill road. It changes direction dramatically, by about 180 degrees or so, leading...

When it comes to choosing between concrete and asphalt roads, there's no one-size-fits-all answer. Each type serves different purposes, and the specific needs of a project should be taken into account. In this article, we'll provide a detailed comparison between concrete and asphalt roads to help you make an informed...

Road alignment refers to the positioning of the center line of a highway on the ground. Put simply, it's the direction the road takes. This is also known as highway alignment. There are two main types: Horizontal Alignment Horizontal alignment comprises three components: Straight paths Curves Horizontal deviations Vertical Alignment...