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 Reconstruction Equations

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From one velocity to another:

                                       

 

To or from a stop:

                                                 

 

Constant movement:
Pedestrian movement, cruise control, perception-reaction phase...

                             

 

Pedestrian throws:

                   
                                             (minimum speed only)

 

Conversions - Angle & Percent of Grade:

                   

 

Grade & Superelevation:

                   

 

Crush Damage Profiling:
Minimum speed only.  L = maximum crush damage in inches.

                             

 

Radius:
TW = track width          m = middle ordinate

         

 

Critical Speed:
If superelevation is 10% or less -

                   

If superelevation is greater than 10% -

                   

 

Airborne:
+D = uphill takeoff grade                -D = downhill takeoff grade
+H = lands lower                           -H = lands higher

                   

 

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This page last updated on 08/14/2005.

Copyright © 1999-2005 Michael O'Brien
All rights reserved.