Locations
With over +150 Engineers and Consultants nationwide, we offer services in all 50 United States.
Locations
With over +150 Engineers and Consultants nationwide, we offer services in all 50 United States.
Locations
With over +150 Engineers and Consultants nationwide, we offer services in all 50 United States.
Locations
With over +150 Engineers and Consultants nationwide, we offer services in all 50 United States.
Locations
With over +150 Engineers and Consultants nationwide, we offer services in all 50 United States.
Locations
With over +150 Engineers and Consultants nationwide, we offer services in all 50 United States.
Locations
With over +150 Engineers and Consultants nationwide, we offer services in all 50 United States.
PETER R. THOM & ASSOCIATES, INC.
A NATIONWIDE MULTI-DISCIPLINARY TEAM OF AUTOMOTIVE CONSULTANTS
Accident Reconstruction Calculators
Below are some basic accident reconstruction tools. They should be used to estimate ranges of answers for common reconstruction calculations. Most problems involves more complicated factors so make sure to consult an Automotive Engineer.
Acceleration: Distance to Speed
This equation is used to estimate the distance it takes to reach a given speed, at a pre-determined level of acceleration. This equation is rearrangement of the Acceleration: Time to Speed equation
Explanation:
D = (Final Speed^2 – Initial Speed^2)
Acceleration
or
D = (Sf^2 – Si^2)
(30 x A)
Where:
D = Distance Traveled (feet)
Sf = Final Speed (mph)
Si = Initial Speed (mph)
30 = Conversion (converts feet per second to miles per hour)
A = Acceleration (g’s)
Example Calculation:
How far would a passenger car travel while accelerating from 30 to 60 mph at a brisk rate?
Low: D = (Sf2 – Si2 ) / (30 x A) = (602 – 302 )/ (30 x 0.2) = 450 feet
High: D = (Sf2 – Si2 )/ (30 x A) = (602 -302 )/ (30 x 0.1) = 900 feet
Answer: 450 – 900 feet
AVERAGE ACCELERATION OF DIFFERENT VEHICLES Acceleration (g's)
From To
Passenger cars, Normal Acceleration
Less than 30 mph 0.1 0.2
More than 30 mph 0.05 0.1
​
Passenger cars, Brisk Acceleration
Less than 30 mph 0.2 0.4
More than 30 mph 0.1 0.2
​
Large or Loaded Trucks, Normal Acceleration
Less than 30 mph 0.05 0.1
More than 30 mph 0.025 0.05
​
Large or Loaded Trucks, Brisk Acceleration
Less than 30 mph 0.1 0.2
More than 30 mph 0.05 0.1
​