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