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A road is only as safe as the distance a driver can see along it. Give someone enough warning and almost any hazard can be handled. Take that warning away and even a slow-moving obstacle becomes lethal. That visible distance has a name — sight distance — and designing for it is one of the central tasks…
Two of the deadliest words in road safety are “head-on”. When two vehicles collide front to front, their speeds add together, and the impact is far worse than any other kind of crash at the same speed. Almost everything in this topic exists to make that particular collision impossible. This post covers traffic separators and…
Most students memorise two numbers here — a single lane is 3.75 m and each lane of a two-lane road is 3.5 m — and then get puzzled. Why would one lane on its own need to be wider than one lane sitting beside another? Surely a vehicle is the same size either way. There is a…
Stand at the edge of any road and look across it. You will notice the centre sits a little higher than the two edges. That gentle hump is not an accident of construction — it is designed, it is measured, and it has a name: camber. This post explains camber in simple language, covers every value…
Every road you have travelled on was shaped by a set of decisions. How wide should it be? How sharply can it turn? How steeply can it climb? How far ahead must a driver be able to see? Answering those questions is what we call geometric design, and it is where the study of highway engineering…
Introduction Highway Engineering is one of the most important subjects in Civil Engineering. It deals with the planning, design, construction, operation, maintenance, and improvement of roads and highways to ensure the safe, efficient, and economical movement of people and goods. Whether you are preparing for GATE, SSC JE, RRB JE, State AE/JE, or university examinations,…
Complete notes on factors controlling geometric design of highway as per IRC with 3 technical diagrams. Covers design speed, topography, traffic, design vehicle, PIEV time, human factors, economic and environmental factors with all IRC criteria for GATE and SSC JE.
Complete notes on Highway Alignment and Surveys in India for GATE CE and SSC JE. Covers factors governing alignment, obligatory points, 3 survey stages (reconnaissance, preliminary, final), modern survey methods (LiDAR, GIS, Drone), horizontal and vertical alignment, summit and sag curves, grade compensation, key formulas, 7 solved MCQs and 6 FAQs.
Complete notes on Geometric Design of Highway as per IRC Indian Standards with 5 technical diagrams. Covers design speed, SSD, OSD, HSD, superelevation, gradient, summit and valley curves with all IRC values for GATE and SSC JE.
Complete notes on Highway Developments in India for GATE CE and SSC JE. Covers NHDP all 7 phases, Golden Quadrilateral, NS-EW Corridor, Bharatmala Pariyojana, PMGSY, expressway development, FASTag, BOT model, modern highway features, technical diagrams, PYQs and FAQs.