Coefficient of Friction Calculator

Road Condition Analysis & Forensic Assessment

Designed by Driven Evidence - Copyright 2026 | US Patent Pending

Road Surface Conditions

Friction Coefficient (μ)
0.80
SAFE CONDITIONS

Vehicle Parameters

60 mph
3500 lbs
1.5 sec

Analysis Results

Total Stopping Distance
264feet
Reaction distance + braking distance
Reaction Distance
132feet
Distance traveled during perception-reaction time
Braking Distance
132feet
Distance to stop after brake application
Stopping Distance Visualization
264 ft
Deceleration
25.8 ft/s²
G-Force
0.80 g
Skid Viability
LIKELY
Forensic Assessment
Under dry asphalt conditions with good tire tread, the vehicle can achieve optimal braking performance. The calculated stopping distance represents ideal conditions with an alert driver.

Legal & Comparative Negligence Factors

Key Considerations for Winter Crashes
  • Duty of Care: Drivers must adjust speed for road conditions regardless of posted limits
  • Skid Mark Analysis: Length correlates directly with speed and friction coefficient
  • Tire Condition Impact: Worn tires can reduce friction coefficient by 15-40% in wet/winter conditions
  • Reaction Time Variables: Average 1.5s, but impairment, distraction, or age can increase to 2.5s+
  • Comparative Fault: Inadequate tires, excessive speed, or failure to maintain control may indicate negligence
At 30 mph
ft
At 45 mph
ft
At 60 mph
ft
At 75 mph
ft