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-9963
Vehicle Class
Truck
Read 1 — Gantry A
Gantry
Aviation Pkwy Gantry
Location
Triangle Expressway near Aviation Pkwy (Morrisville)
Coordinates
35.8340, -78.7970
Timestamp
2026-07-19T12:54:33.514
Plate Read Confidence
99.3%
Read 2 — Gantry B
Gantry
NC 540 Gantry
Location
Triangle Expressway near NC 540 (Cary)
Coordinates
35.8400, -78.7000
Timestamp
2026-07-19T12:59:05.757
Plate Read Confidence
99.6%
Time-Over-Distance Calculation
Surveyed Distance
6.8 mi
Elapsed Time
04:32.243 (MM:SS.mmm)
Calculated Avg Speed
89.9 mph
Posted Limit Delta
+19.9 mph
Threshold Check
Active Threshold
80 mph
Result
EXCEEDED
Magnitude over Threshold
+9.9 mph
Edge Case Checks
Inferred Stop Between Gantries
None
Plate Read Confidence A ≥ 95%
PASS
(99.3%)
Plate Read Confidence B ≥ 95%
PASS
(99.6%)
Timestamp Anomaly Check
PASS
Confidence Score
99.4
/ 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
Past due
Date Paid
not yet paid
Payment Method
Not yet paid
Fine Amount
$150.00
Reviewer
Reviewer
Pending review