Vehicle Braking Distance

Stopping distance from speed, friction, grade, reaction time.

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Formula and source

Braking distance d = v² / (2 × g × (μ + grade)) + reaction_distance. Reaction distance = v × t_reaction. g = 32.2 ft/s².

Classical kinematics; AASHTO 'Policy on Geometric Design of Highways and Streets' (Green Book) by name.

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