Brach Engineering, LLC.

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to the analysis of, and solutions to, engineering problems.

Professional Development Seminar

Vehicle Accident Reconstruction Methods

Raymond M. Brach and R. Matthew Brach

Ray Brach and Matt Brach taught the SAE Professional Development seminar on accident reconstruction from 2004 until 2010. While Ray and Matt no longer teach the very popular Accident Reconstruction class at SAE, Brach Engineering makes that same class available to be taught at your company. The material presented in the seminar parallels the material contained in the book Vehicle Accident Analysis and Reconstruction Methods. The seminar includes additional examples beyond those in the book.These examples are contained in the class notes provided to the attendees of the seminar and covered as part of the class.

This seminar is available in either the one, two or three-day format, to companies and agencies for presentation to groups involved in the reconstruction and analysis of crashes. The three-day format includes all the available topics as well as a hands-on section in which the attendees actually reconstruct an accident using software. Arrangements can be made for a custom seminar where interested companies may pick and choose topics to be covered.

Each day runs from 8:30 a.m. to 4:00 p.m. with a lunch break. The price of the seminar is only $2,000 per day, plus travel expenses.

If you are interested in the Professional Development Seminar, please fill out the form below.

Seminar Schedule
  1. Uncertainty in Measurements and Calculations
    Three methods of estimating uncertainty - upper and lower bounds, differential variations, and statistics of related variables
  2. Straight-Line Motion
    Position, speed, and acceleration as functions of time, braking, and stopping distance
  3. Analysis of Collisions, Impulse-Momentum Theory
    Full and rigorous coverage of point mass impact theory, conservation of momentum, and planar impact mechanics
  4. Crush Energy, ΔV and tangential energy loss
    Estimation of crush energy using the CRASH3 algorithm and proper estimation of tangential energy loss
  5. Frontal Vehicle-Pedestrian Collisions
    Mechanics of pedestrian-vehicle impact and vehicle motion
  1. Planar Photogrammetry
    Transformation of points on a photograph to known and unknown points on a flat surface
  2. Mechanics and Modeling of Tire Forces
    Equations of tire side force (cornering force), tire longitudinal force (braking or accelerating), and combined forces
  3. Critical Speed From Tire Yaw Marks
    Use of the critical speed formula and experimental variations
  4. Vehicle Dynamics Simulation
    Dynamics of a single vehicle or a tow vehicle and semi-trailer, sophisticated tire model, rigid suspension, specific vehicle physical characteristics, steering and lane-change maneuvers, locked-wheel braking or tabular steer inputs, dual friction flat surface
  5. Articulated Vehicle Impact
    Full and rigorous application of the conservation of momentum and planar impact mechanics applied to articulated (pin-connected) vehicles
  6. Wrap-up Reconstruction
    A complete example of the reconstruction of vehicle preimpact speeds using:
    • crush measurements, energy loss and planar impact mechanics
    • post-impact travel and planar impact mechanics
  1. Light Vehicle Rollover Reconstruction
    Presentation of vehicle and site examination as well as the analysis and reconstruction of pre-trip, trip, and post-trip phases of rollover accidents
  2. Hands-On Reconstruction
    Attendees reconstruct several example crashes using software (VCRware) provided by Brach Engineering. A tutorial on the use of the software is included.

Reconstruction Seminar Presentation Request Form


Thank you for filling out our Reconstruction Seminar Presentation Request form. An e-mail has been sent to us, and we will contact you soon to set up the details of your presentation request and address any questions/concerns you may have had.