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-3804
Vehicle Class
Truck
Read 1 — Gantry A
Gantry
Aviation Pkwy Gantry
Location
Triangle Expressway near Aviation Pkwy (Morrisville)
Coordinates
35.8340, -78.7970
Timestamp
2026-07-20T07:35:09.630
Plate Read Confidence
99.1%
Read 2 — Gantry B
Gantry
NC 540 Gantry
Location
Triangle Expressway near NC 540 (Cary)
Coordinates
35.8400, -78.7000
Timestamp
2026-07-20T07:40:03.969
Plate Read Confidence
99.2%
Time-Over-Distance Calculation
Surveyed Distance
6.8 mi
Elapsed Time
04:54.339 (MM:SS.mmm)
Calculated Avg Speed
83.2 mph
Posted Limit Delta
+13.2 mph
Threshold Check
Active Threshold
80 mph
Result
EXCEEDED
Magnitude over Threshold
+3.2 mph
Edge Case Checks
Inferred Stop Between Gantries
None
Plate Read Confidence A ≥ 95%
PASS
(99.1%)
Plate Read Confidence B ≥ 95%
PASS
(99.2%)
Timestamp Anomaly Check
PASS
Confidence Score
99.2
/ 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
2026-07-10 09:53:39
Payment Method
Mail
Fine Amount
$150.00
Reviewer
Reviewer
Pending review