Tactical Crosswalk & Roadway Visualizer
T+0.00s
Oncoming Car
Store Worker
Pedestrian
Braking Point
Physical Kinematics Formulation
This model evaluates two competing physical events: vehicle deceleration and heroic pedestrian extraction sprint.
Total Stop = (v × t_react) + (v² / (2 × a_brake))
Where v is velocity (ft/s), t_react is perception-brake delay, and a_brake = g × 32.174 ft/s². The worker sprints across the sidewalk-to-crosswalk corridor at dynamic sprint velocity.
Rescue Scenario Parameters
30 mph
45 ft
180 ms
0.70 g
Simulation Result
Successful Rescue
🛡️
Reaction Distance
7.9 ft
Stopping Distance
42.8 ft
Total Stop Distance
50.7 ft
Worker Reach Time
0.42 s
Safety Clearance Margin
+2.2 ft
Context: Modeled after the viral report of a heroic store worker snatching a young pedestrian to safety before vehicle intrusion. Standard dry pavement friction = 0.7–0.8g, typical human panic sprint = 15–18 ft/s.