Rail Engineering
Planning calculators for rail engineering — estimates from industry-style inputs.
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Track Superelevation Calculator
Calculate rail cant (superelevation) from curve radius and design speed using the AREMA formula e = 0.0007 × V²/R.
Rail Stress Calculator
Calculate thermal stress in continuous welded rail (CWR) from temperature change using σ = E × α × ΔT. Assess buckling and break risk.
Turnout Design Calculator
Calculate railroad switch/turnout geometry from frog number — frog angle, lead length, curve radius, and maximum diverging speed.
Grade Crossing Warning Calculator
Calculate highway-rail grade crossing warning time, approach circuit distance, and clearance time per MUTCD and FRA requirements.
Rail Wear Calculator
Estimate rail wear rate and service life from traffic tonnage (MGT), curve degree, rail weight, lubrication, and rail grade. Includes grinding intervals and cost estimates.
Catenary Design Calculator
Design overhead catenary system parameters: messenger wire sag, contact wire height, wind deflection, dropper count, and electrical clearances.
Train Braking Distance Calculator
Calculate emergency and service braking distances from speed, grade, and brake coefficient using d = V²/(2g(μ±G)).
Platform Length Calculator
Calculate station platform length from train consist, car count, locomotive configuration, and stopping tolerance. Includes ADA zone and capacity estimates.
Track Capacity Calculator
Estimate daily and annual train capacity from signal system type, number of tracks, segment length, and operating parameters.
Railroad Bridge Load Rating Calculator
Calculate Cooper E load rating for railroad bridges from member capacity, dead load, and live load effects per AREMA Chapter 15.