1 / 6

Analyzing Vehicle Speed from Skid Marks and the Impact of Perception-Reaction Time

Understanding vehicle speed determination from skid marks involves analyzing perception-reaction time. This response time can vary based on individual circumstances and influences the distance traveled before a driver reacts. By using the formula PR = (MPH) x (FPSC) x (RT), where MPH denotes speed, FPSC is a conversion factor, and RT is reaction time in seconds (commonly estimated at 1.5 seconds), we can calculate the distance a vehicle moves during this critical reaction phase. Keep in mind that these measurements offer estimates rather than definitive values.

shadow
Télécharger la présentation

Analyzing Vehicle Speed from Skid Marks and the Impact of Perception-Reaction Time

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Determining Vehicle Speed From Skid Marks

  2. Perception Reaction • Response Time – The speed in which a person can respond to an event. • Response Time can vary from person to person and situation to situation. • It is possible to determine the distance a vehicle travels during the response time of the driver.

  3. Perception Reaction • Formula Used to Calculate Distance Traveled During the Reaction Time PR = (MPH) X (FPSC) X (RT) PR - Distance Traveled During Perception Reaction MPH - Speed In Known Miles Per Hour FPSC - Feet Per Second Converter (1.4667) RT - Reaction Time In Seconds (1.5)

  4. Perception Reaction MPH – Speed In Known Miles Per Hour • The known speed is determined by measuring the length of the skid mark

  5. Perception Reaction Reaction Time In Seconds • It is a Common practice for Accident Re-Constructionist to use the standard reaction time of 1.5 seconds. • This is only an estimate. There can be no single number that applies universally.

More Related