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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)
| Approach 1 | Approach 2 | Approach 3 | Approach 4 | ||
|---|---|---|---|---|---|
Name of approach leg |
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MAINADT |
Main Street ADT | ||||
MAINHISPD |
Main street speed limit ≥ 35 mph (1=yes, 0=no) | ||||
TURNVEH |
Presence of turning vehicle traffic across the path of through cyclists (1=yes, 0=no) | ||||
RTLANES |
Number of right turn traffic lanes on main street approach | ||||
BL |
Bike lane present (1=yes, 0=no) | ||||
CROSSADT |
Cross street traffic volume | ||||
SIGNAL |
Traffic signal at intersection (1=yes, 0=no) | ||||
PARKING |
On-street parking on main street approach (1=yes, 0=no) | ||||
RTCROSS |
Number of traffic lanes for cyclists to cross to make a right turn | ||||
CROSSLNS |
Number of through lanes on cross street | ||||
LTCROSS |
Number of traffic lanes for cyclists to cross to make a left turn | ||||
Safety Index Through Value = |
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Safety Index Right Turn Value = |
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Safety Index Left Turn Value = |
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