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Ped ISI Calculator

 

The following documents accompany this Pedestrian and Bicyclist Intersection Safety Indices (ISI) Calculator:

Pedestrian and Bicyclist Intersection Safety Indices: User Guide (Publication No. FHWA-HRT-06-130)
Pedestrian and Bicyclist Intersection Safety Indices: Final Report (Publication No. FHWA-HRT-06-125)

Download Excel Version

Crosswalk 1 Crosswalk 2 Crosswalk 3 Crosswalk 4
 
Name of crosswalk
       
SIGNAL
Signalized (1=yes, 0=no)        
STOP
Stop Controlled (1=yes, 0=no)        
THRULNS
Number of Through Lanes on Main St        
SPEED
85th Percentile Speed on Main St        
MAINADT
Main Street ADT        
COMM
Commercial Area (1=yes, 0=no)        

 

Safety Index Value =
       

The image shows an overhead view of an intersection with crosswalk lines. The left-right street is labeled Main Street and the up-down street is labeled Cross Street. The crosswalk on the right side of the intersection (crossing the Main Street leg) is indicated to be the crosswalk of interest. The point is that 'main' street does not refer to the street with the higher traffic volume, but rather the street that is being crossed by the crosswalk of interest.

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United States Department of Transportation - Federal Highway Administration