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Learn skid resistance and braking characteristics in traffic engineering. Three formula cases based on known parameters, brake efficiency formula, PCU table, and fully solved numerical examples.
Complete introduction to traffic engineering. Covers road user characteristics, vehicular characteristics, braking characteristics, objectives, and overview of all 7 traffic studies.
Complete quick-revision guide for highway geometric design. IRC 32-2015 serviceability indicators, negative superelevation, ruling radius, design vehicle, road delineator, and all key formulas in one place.
Learn how to locate the highest point on a summit curve and lowest point on a valley curve. Derivation of x₀ = n₁L/N (square parabola) and x₀ = L√(n/2N) (cubic parabola) with solved examples.
Complete guide to valley curve length formulas (comfort + HSD) for both L>S and L
Step-by-step derivation of summit curve length formulas for both cases (L>S and L
Step-by-step derivation of summit curve length formulas for both cases (L>S and L
Complete guide to valley (sag) curves in highway vertical alignment. Four types, night headlight sight distance criterion, comfort criteria, cubic parabola design, and comparison with summit curves.
Detailed guide to summit curves in vertical alignment. Covers all 4 types, why IRC uses square parabola, VPC/VPI/VPT positions, deviation angle N, and complete length formulas for SSD and OSD.
Complete IRC gradient table for highway design. Ruling, limiting, and exceptional gradients for plain/rolling, mountainous, and steep terrain with design rules and drainage minimum values.