AUTOMATED SPEED ENFORCEMENT
Calculation Audit Trail
Corridor
Corridor Name
Triangle Expressway
Gantry A
NC 540 Gantry
Gantry B
Aviation Pkwy Gantry
Surveyed Distance
6.8 mi
Enforcement
Posted Limit
70 mph
Active Threshold
80 mph (posted + 10)
Subject Vehicle
Plate (Synthetic)
DEMO-0793
Vehicle Class
Sedan
Read 1 — Gantry A
Gantry
NC 540 Gantry
Location
Triangle Expressway near NC 540 (Cary)
Coordinates
35.8400, -78.7000
Timestamp
2026-07-20T21:52:45.315
Plate Read Confidence
97.9%
Read 2 — Gantry B
Gantry
Aviation Pkwy Gantry
Location
Triangle Expressway near Aviation Pkwy (Morrisville)
Coordinates
35.8340, -78.7970
Timestamp
2026-07-20T21:57:45.515
Plate Read Confidence
98.4%
Time-Over-Distance Calculation
Surveyed Distance
6.8 mi
Elapsed Time
05:00.200 (MM:SS.mmm)
Calculated Avg Speed
81.5 mph
Posted Limit Delta
+11.5 mph
Threshold Check
Active Threshold
80 mph
Result
EXCEEDED
Magnitude over Threshold
+1.5 mph
Edge Case Checks
Inferred Stop Between Gantries
None
Plate Read Confidence A ≥ 95%
PASS
(97.9%)
Plate Read Confidence B ≥ 95%
PASS
(98.4%)
Timestamp Anomaly Check
PASS
Confidence Score
98.2
/ 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
2026-07-16 22:35:39
Payment Method
Online
Fine Amount
$150.00
Reviewer
Reviewer
Pending review