This is a
linked index to all articles and tools on our web site.
Automotive Event Data Recorders
On-board crash data event recorders
(black boxes) are now installed on many new cars and light trucks. These
devices record a vehicle's speed, seat belt use, brake application and more
for up to 5 seconds before an impact.
Skid Speed Calculator
This is an on-line calculator that
will provide the minimum speed of a car through a skid. It is not a substitute
for a thorough collision analysis by a qualified accident reconstructionist.
These are two articles on determining speeds
from skid marks and evaluating skid mark evidence.
Photogrammetry is used in many different fields
including topographic mapping, engineering,
archeology and police traffic crash and crime scene investigations.
A short article on some of the
technical difficulties of trying to obtain a photographic image of what a
driver could have or should have seen just before an accident during the hours
of darkness or periods of twilight.
Lamp Examination to Determine On or Off in a Collision
There are ways to tell if the
headlights, taillights or brake lights on a car were on or off following a
collision. This article details some of the things to look for when conducting
a lamp examination.
Environmental Factors - Determining Ambient Light Levels
A large percentage of accidents
happen just at sunset and sunrise. Do you know how to tell when civil twilight
begins and ends? Many states require headlights to be used in conjunction with
civil twilight. The possibility of glare from the sun can also be analyzed.
This article provides details and resources on determining the position of the
sun and moon for any place on Earth at any time and where to obtain historical
weather data. Updated in 2005.