Committed to the dissemination of information related
to the analysis of, and solutions to, engineering problems.
Professional Development Seminar
Vehicle Accident Reconstruction Methods
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.
Three methods of estimating uncertainty - upper and lower bounds, differential variations, and
statistics of related variables
Position, speed, and acceleration as functions of time, braking, and stopping distance
Analysis of Collisions, Impulse-Momentum Theory
Full and rigorous coverage of point mass impact theory, conservation of momentum, and planar
Crush Energy, ΔV and tangential energy loss
Estimation of crush energy using the CRASH3 algorithm and proper estimation of tangential energy
Frontal Vehicle-Pedestrian Collisions
Mechanics of pedestrian-vehicle impact and vehicle motion
Transformation of points on a photograph to known and unknown points on a flat surface
Mechanics and Modeling of Tire Forces
Equations of tire side force (cornering force), tire longitudinal force (braking or
accelerating), and combined forces
Critical Speed From Tire Yaw Marks
Use of the critical speed formula and experimental variations
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
Articulated Vehicle Impact
Full and rigorous application of the conservation of momentum and planar impact mechanics applied to articulated (pin-connected) vehicles
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
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
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.