Comment:
Model equations for Ped ISI and Bike ISI. Keep in mind that these tools were developed to evaluate the safety of an individual crosswalk or approach leg, not the intersection as a whole. Ped ISI factors: Type of traffic control for leg of crossing (signal, stop sign, or neither), Number of through vehicle lanes on main street (total through lanes in both directions), Eighty-fifth percentile traffic speed on main street, Average daily traffic (ADT) of main street, Predominant development type surrounding the intersection (commercial or not commercial). Bike ISI factors: Presence of bicycle lane on main street, ADT on main and cross streets, Number of through vehicle lanes on cross street, Number, type, and configuration of traffic lanes on main street approach, Speed limit on main street, Presence of on street parking on main street approach, Type of traffic control on approach of interest (signal or no signal)

Last Updated (Year): 2007

Year Produced: 2007

Abstract:

The Pedestrian and Bicycle Intersection Safety Indices (Ped ISI and Bike ISI) are a set of models that enable users to identify intersection crossings and intersection approach legs that should be the greatest priority for undergoing indepth pedestrian and bicycle safety assessment. This TechBrief summarizes the final report which had the development of these indices as its primary objective.

For:Walking, Biking

The E's:Evaluation

Ped Bike Activity:

• Auditing
• Assessment

Ped Bike Topic:

• Safety
• Intersections
• Crashes
• Assessment
• Analysis

Facility Type:Unsignalized Intersection, Signalized Intersection, Crosswalk

Resource Type:

• Guidance

Link to Content Source:

Pedestrian and Bicyclist Intersection Safety Indices