AUTOMATED SPEED ENFORCEMENT
Calculation Audit Trail
Corridor
Corridor Name
I-77 Express
Gantry A
Exit 23 Gantry
Gantry B
Exit 28 Gantry
Surveyed Distance
4.7 mi
Enforcement
Posted Limit
65 mph
Active Threshold
75 mph (posted + 10)
Subject Vehicle
Plate (Synthetic)
DEMO-1403
Vehicle Class
Sedan
Read 1 — Gantry A
Gantry
Exit 23 Gantry
Location
I-77 Express near Exit 23 (Huntersville)
Coordinates
35.4130, -80.8420
Timestamp
2026-07-21T11:14:20.064
Plate Read Confidence
97.2%
Read 2 — Gantry B
Gantry
Exit 28 Gantry
Location
I-77 Express near Exit 28 (Cornelius)
Coordinates
35.4700, -80.8750
Timestamp
2026-07-21T11:17:40.971
Plate Read Confidence
99.0%
Time-Over-Distance Calculation
Surveyed Distance
4.7 mi
Elapsed Time
03:20.907 (MM:SS.mmm)
Calculated Avg Speed
84.2 mph
Posted Limit Delta
+19.2 mph
Threshold Check
Active Threshold
75 mph
Result
EXCEEDED
Magnitude over Threshold
+9.2 mph
Edge Case Checks
Inferred Stop Between Gantries
None
Plate Read Confidence A ≥ 95%
PASS
(97.2%)
Plate Read Confidence B ≥ 95%
PASS
(99.0%)
Timestamp Anomaly Check
PASS
Confidence Score
98.1
/ 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