Safe Ride — The School Bus Fleet Tracker
The Infrastructure Challenge
Live location trackers spamming database backends causes high server bills. For a fleet of 500+ buses emitting coordinates every second, database writes reached millions daily, threatening to exhaust hosting budgets.
The Engineering Flex
We bypassed generic framework options and constructed a modular, optimized algorithm directly tailored to the systems overhead constraints.
We designed a 3-layer GPS telemetry throttling engine built on-device in Flutter. The engine dynamically evaluates vehicle acceleration, bearing change, and idle thresholds. It batches and pre-filters location packets, skipping coordinate writes when the bus is waiting at stop lights, and streaming coordinates at variable rates based on speed. This optimizes tracking precision while dramatically reducing cloud storage hits.
// Flutter Telemetry Filter logic
class GPSThrottler {
static const double minDistanceThreshold = 10.0; // meters
static const double minAngleThreshold = 15.0; // degrees
Position? _lastSentPosition;
bool shouldUpload(Position current) {
if (_lastSentPosition == null) return true;
final distance = calculateDistance(
_lastSentPosition!.latitude, _lastSentPosition!.longitude,
current.latitude, current.longitude
);
final headingDiff = (current.heading - _lastSentPosition!.heading).abs();
// Only upload if vehicle moved significantly or changed direction
if (distance >= minDistanceThreshold || headingDiff >= minAngleThreshold) {
_lastSentPosition = current;
return true;
}
return false;
}
}Project Outcomes
Technologies Utilized
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