Stop Distance

Stop Distance turns abstract stopping-distance rules into concrete feet and car-lengths you can rehearse—offline, on device, with no account. In one Stopping Distance workspace, set speed, road grade, surface condition (dry, wet, packed snow/ice educational presets), and perception-reaction assumptions. Instantly see total distance split into labeled perception, reaction, and braking segments, plus car-length equivalents and an expandable plain-language formula panel so every input stays transparent. Measure your own reaction time with a multi-trial on-device tap test. View your average and optionally apply it as the reaction component for later calculations. Timing data stays on your device. Practice judgment with seeded “Will I stop?” scenarios—queue ahead, school-zone cone, amber dilemma, animal at fixed range. Resolve stop versus continue and reveal whether your current envelope…