The Traffic Accident Reconstruction Origin -Approach Angles-

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This is TARO Approach Angles. It a place for traffic accident reconstructionists to compare ideas, notes and methods of solutions. Rarely does a reconstructionist have all the information he wants. He must make assumptions about the collision to arrive at an answer. You are invited to examine the facts about the accidents below, decide on an approach, write up a solution and submit your answer. Approach Angles will publish the submissions of several different reconstructionists. Each solution will represent a different analysis of the same set of facts.

This is also a place to learn. There are many schooled reconstructionists that don't have the benefit of hundreds of collisions to draw upon. When given all the "numbers" they can do the calculator part and arrive at the correct answer. But the numbers are not printed on the road, the damaged vehicle or the skidmark. The evidence has to be recognized as important, documented and then measured. After all the facts are gathered, it's time for the calculator. The solutions published here are an opportunity for the schooled but lesser experienced to learn. It's a chance to look over somebody else's shoulder.

How this page works

Guidelines for submissions.

Your report should be a narrative of:

How to Submit a Solution

If there is already a solution published that is similar to the one you would take, there is no need to duplicate it. In order to prevent duplication of work contact TARO ( feedback or a phone call) prior to committing to your analysis.

The suggestions for the narrative are exactly that: suggestions. If they are not appropriate ignore them. Feel free to use your own particular reporting style. But, remember your audience as you write. You don't have to explain what a skidmark is.

Software authors are welcome to submit your products analysis of these facts.

Most importantly, if you disagree with a published solution, assumption or technique, document your position and submit it. That is why Approach Angles is here.

Your submission should include:

  1. a printed copy of your analysis.
  2. 8.5 x 11 hard copies of all exhibits (software reports ...).
  3. a 3.5 inch floppy disk with:
  4. drawings or photographs you used (sketches, a photo of an exemplar vehicle ...).
  5. a longhand calculation sheet. (it will be scanned as a graphic).
  6. anything else you think important.

Submit your package to
TARO Approach Angles
PO Box 6200
Lake Worth FL.

A word about the information presented here.

These are descriptions, pictures and diagrams of an actual collision. This information is drawn from documents that are in the public record. TARO recognizes that a serious collision has deep personal consequences to those involved. The display of this information is not an attempt to draw attention to any person, or add to the difficulty or loss that they face. Rather, these facts are presented so that others might learn from their misfortune. It is the hope that future collision victims will benefit from this analysis with a more accurate investigations and safer vehicles.

Taro will deliberately disguise the names of individuals, tag numbers, street names, facial features and any other information that might bring attention to those persons involved. These changes will not affect the material facts and their subsequent analysis.

A List of Cases

A rainy day collision


Too Fast

Ped Skid

An Errant Piece of Evidence

Motorcycle Photo

Tire Marks

Why do we pull drag sleds through the center of mass?

What is Context?

Two Inline Momentum Problems

Two Different Stories

Two Green Lights

  • No Announced Solutions
Speed Estimate From Crush


If you have a case you would like to present here, outline it and E-mail it to TARO through feedback.

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