Urban Crosswalk Sightline & Traffic Flow Simulator

AASHTO Physics
Drag vehicle or pedestrian on canvas
Sightline Ray
Obscured Blind Spot
Stopping Distance (SSD)
Pedestrian Clearance
Safety Diagnostic & Conflict Verdict
High Risk - Obscured Sightline
Driver stopping distance exceeds sightline visibility due to parked vehicle obstruction.
Driver Reaction Dist
77.0ft
Distance traveled during perception & reaction time
Braking Distance
161.4ft
d = v² / (30 × f) skid deceleration
Stopping Sight Dist
238.4ft
Total required stopping margin
Pedestrian Clearance
12.57sec
Crosswalk traverse time at walking speed
Sight Obscured Zone
24.5ft
Driver distance blinded by parked car

Calculated Engineering Parameters Mirror

Parameter Name Calculated Value AASHTO Reference Standard
Safety Verdict High Risk - Obscured Sightline Clear sight triangle required
Driver Reaction Distance 77.0 ft t = 1.5s reaction latency
Braking Distance 161.4 ft f = 0.35 friction coefficient
Stopping Sight Distance (SSD) 238.4 ft Reaction + Braking Total
Pedestrian Clearance Time 12.57 sec Standard 3.5 ft/sec walking speed
Sightline Obscured Zone 24.5 ft Daylighting setback offset

Street Geometry & Physics

35 mph
4 lanes
11 ft
10 ft
0 ft
3.5 ft/s
1.5 sec
0.35
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