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-9320
Vehicle Class
Van
Read 1 — Gantry A
Gantry
Aviation Pkwy Gantry
Location
Triangle Expressway near Aviation Pkwy (Morrisville)
Coordinates
35.8340, -78.7970
Timestamp
2026-07-18T21:09:40.690
Plate Read Confidence
98.9%
Read 2 — Gantry B
Gantry
NC 540 Gantry
Location
Triangle Expressway near NC 540 (Cary)
Coordinates
35.8400, -78.7000
Timestamp
2026-07-18T21:14:31.505
Plate Read Confidence
94.3%
Time-Over-Distance Calculation
Surveyed Distance
6.8 mi
Elapsed Time
04:50.815 (MM:SS.mmm)
Calculated Avg Speed
84.2 mph
Posted Limit Delta
+14.2 mph
Threshold Check
Active Threshold
80 mph
Result
EXCEEDED
Magnitude over Threshold
+4.2 mph
Edge Case Checks
Inferred Stop Between Gantries
None
Plate Read Confidence A ≥ 95%
PASS
(98.9%)
Plate Read Confidence B ≥ 95%
FAIL
(94.3%)
Timestamp Anomaly Check
PASS
Confidence Score
96.6
/ 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
Past due
Date Paid
not yet paid
Payment Method
Not yet paid
Fine Amount
$150.00
Reviewer
Reviewer
Pending review