AUTOMATED SPEED ENFORCEMENT
Calculation Audit Trail
Corridor
Corridor Name
Triangle Expressway
Gantry A
Aviation Pkwy Gantry
Gantry B
NC 540 Gantry
Surveyed Distance
6.8 mi
Enforcement
Posted Limit
70 mph
Active Threshold
80 mph (posted + 10)
Subject Vehicle
Plate (Synthetic)
DEMO-9691
Vehicle Class
SUV
Read 1 — Gantry A
Gantry
Aviation Pkwy Gantry
Location
Triangle Expressway near Aviation Pkwy (Morrisville)
Coordinates
35.8340, -78.7970
Timestamp
2026-07-20T08:43:57.173
Plate Read Confidence
97.9%
Read 2 — Gantry B
Gantry
NC 540 Gantry
Location
Triangle Expressway near NC 540 (Cary)
Coordinates
35.8400, -78.7000
Timestamp
2026-07-20T08:48:19.546
Plate Read Confidence
98.9%
Time-Over-Distance Calculation
Surveyed Distance
6.8 mi
Elapsed Time
04:22.373 (MM:SS.mmm)
Calculated Avg Speed
93.3 mph
Posted Limit Delta
+23.3 mph
Threshold Check
Active Threshold
80 mph
Result
EXCEEDED
Magnitude over Threshold
+13.3 mph
Edge Case Checks
Inferred Stop Between Gantries
None
Plate Read Confidence A ≥ 95%
PASS
(97.9%)
Plate Read Confidence B ≥ 95%
PASS
(98.9%)
Timestamp Anomaly Check
PASS
Confidence Score
98.4
/ 100
Methodology: confidence score is the mean of the two plate read confidences, adjusted for any failed edge case check. Reads below 95% trigger a flag for review. Stop-time and timestamp-anomaly failures suppress automatic issuance.
Payment
Status
Paid
Date Paid
2026-07-07 12:46:39
Payment Method
Mail
Fine Amount
$300.00
Reviewer
Reviewer
Pending review