Crash Math Academy vs Rapid Response by DRI

You signed up for the crash reconstruction course. You paid the tuition. You booked the hotel. Then someone told you there would be math. Crash Math Academy was built for exactly this moment. This app takes you from basic addition all the way through advanced collision analysis formulas — one step at a time, in plain language anyone can follow. No math degree required. Just clear explanations, real crash examples, and the exact TI-30Xa calculator keystrokes for every problem. Created by a current law enforcement officer working in North Texas with over 35 years of collision investigation experience. Brian Watson 109, LLC. 7 PROGRESSIVE SECTIONS — 830 PRACTICE PROBLEMS Math Foundations — 13 lessons: basic operations, fractions, percentages, exponents, scaling, PEMDAS, algebra, formula rearrangement, and quadratics Pythagorean Theorem — Right triangles, distance, and scale diagram math Trigonometry — Sine, cosine, tangent, angle of impact, grade, and superelevation Unit Conversions — mph to fps, feet to meters, time-distance analysis Physics — Newton's Laws, kinetic energy, momentum, friction, and drag factor Core Crash Formulas — Skid speed, vault, pedestrian impact, yaw, truck/trailer, braking efficiency, e-scooter, bicycle, and height measurement Advanced — Delta-V, CRASH3, coefficient of restitution, closing speed, BEV, PDOF, inline momentum, angle collision X-Y components, and T-bone analysis Every problem generates fresh numbers each time — you learn the math, not memorize answers. Every solution shows detailed step-by-step work. TI-30Xa CALCULATOR KEYSTROKES Every lesson includes exact button-by-button keystrokes for the TI-30Xa — the same calculator used in reconstruction courses nationwide. 39 FLASH CARDS WITH VOICE READING Tap to flip between formula and explanation. Tap the speaker icon to hear the formula read aloud with a high-quality natural voice. 94 FORMULA REFERENCE CARDS A complete formula library in 8 sections. Every card shows the formula, defines every variable, and walks through a worked example. PRINT AND PDF EXPORT Export flash cards and formula cards to PDF. Pick exactly which cards to include. Print study sheets for class or pin formulas to your wall. QUIZZES AND 100-QUESTION FINAL EXAM Pass each section quiz to unlock the next. Take the 100-question practice exam pulling from all unlocked sections — the closest thing to your certification math test. IMPERIAL AND METRIC UNITS One tap switches the entire app between Imperial and Metric. Every lesson, formula, problem, flash card, quiz, and exam adapts. Imperial default for U.S. courses. Metric for investigators worldwide. PROGRESS TRACKING Track completed lessons, quiz scores, problem history, and overall readiness. The app identifies your weak areas. 100% OFFLINE — ZERO DATA COLLECTION No internet. No login. No ads. No tracking. Everything runs on your device. Your data stays on your phone. WHO THIS APP IS FOR Officers heading to their first crash course — no math background needed. Reconstructionist refreshing before recertification. Investigators worldwide. Anyone who was told "there will be math" and wants to show up ready. You are about to walk into the hardest math class of your career. Crash Math Academy makes sure you walk in ready.

Rapid Response is the crash reconstruction toolkit built for forensic traffic analysts, collision investigators, and law enforcement professionals who need accurate math in the field — not back at the office. Built by the Driver Research Institute, Rapid Response puts 70+ peer-referenced formulas, case documentation tools, and crash-data lookups in one app, with results you can trust and export straight into a report. CALCULATIONS • 70+ formulas covering speed from skid/yaw, drag factor, braking, conservation of momentum, pedestrian throw, motorcycle and bicycle dynamics, lead-vehicle avoidance, perception-reaction time, and more • Switch instantly between US, SI, and UK unit systems • Auto-fill presets with tappable source citations linking straight to the underlying research • Step-by-step "working" breakdowns you can review, not just a final number • Built-in Monte Carlo sensitivity analysis for uncertainty ranges FIELD TOOLS • Scene Diagram — freehand scene sketching with adjustable point density, built for on-scene documentation • Photo Log — in-app camera with automatic GPS, timestamp, and case-note EXIF embedding • Vehicle Inspection — structured photo and note capture for post-crash vehicle documentation • VIN Doctor — decode a VIN and pull IIHS safety ratings • Case Manager — organize calculations, photos, and notes by case • Sun & Moon — lighting-condition lookups for time-of-crash visibility analysis CRASH DATA LOOKUPS • FARS Crash Lookup — search NHTSA's Fatality Analysis Reporting System • UK Crash Lookup — search UK Department for Transport STATS19 collision data REPORTING • Generate a clean PDF export of your calculations, complete with citations, ready to attach to a case file COMMUNITY • A professional forum to discuss cases, methods, and best practices with other reconstructionists Rapid Response is free to use during our launch period — no subscription required to access the full formula library, tools, and forum. Create a free account to get started. Rapid Response is a calculation and documentation aid. It does not constitute legal or engineering advice and is not a substitute for professional judgment or licensed expert testimony. See in-app Terms of Use for details.