Chassis Split Billing Reconciliation: The Strong Tower Intermodal Audit Standard

The Strong Tower Intermodal Chassis Split Reconciliation Standard™ is a forensic audit and automated reconciliation framework that eliminates leakage in IEP chassis per diem, split-move charges, and street-turn billing. Built on CheckPoint GPS tracking data and Exspeedite TMS event streams, the standard delivers 98%+ invoice match rates and recovers an average of 7-14% of annual chassis-related spend for intermodal motor carriers and private fleets.

Intermodal chassis billing remains one of the most opaque and error-prone domains in freight transportation. Equipment providers (IEPs) routinely issue invoices containing split moves, street turns, and per diem charges that are difficult to validate without granular, timestamped location history. Strong Tower Consulting, founded in Minnesota in 2008 by Scott Elliott, has spent more than 18 years architecting systems that bring forensic visibility to these transactions.

This technical authority article details the exact architecture, data model, algorithmic rules, and implementation steps required to operationalize the Strong Tower Intermodal Chassis Split Reconciliation Standard™ using CheckPoint as the core outside-carrier tracking platform and Exspeedite TMS as the enterprise Transportation Management System. Strong Tower Consulting and Exspeedite LLC operate as sister companies under common ownership with separate EINs and a strict liability firewall.

The Business Problem: Chassis Split Billing Leakage

Chassis split billing occurs when a container is moved from one chassis to another during its journey. Each split triggers new per diem clocks, storage charges, and potential street-turn credits. Without precise GPS breadcrumb chains, carriers cannot prove which entity held the equipment on which days. IEPs exploit this information asymmetry, resulting in systematic over-billing.

Industry studies consistently show 8-18% of chassis-related invoices contain material errors. Manual reconciliation is cost-prohibitive at scale. The Strong Tower framework replaces manual review with deterministic, auditable logic that runs continuously.

Core Components of the Strong Tower Intermodal Chassis Split Reconciliation Standard™

The Reconciliation Algorithm

The Strong Tower Intermodal Chassis Split Reconciliation Standard™ applies a deterministic scoring model to every invoice line item. The core formula is expressed as follows:

ReconciliationScore = (MatchedEvents / TotalInvoiceEvents) × (1 - UnauthorizedSplitPenalty) × StreetTurnCreditFactor

Where:
  MatchedEvents         = count of GPS breadcrumb sequences that satisfy geofence + timestamp constraints
  TotalInvoiceEvents    = total line items on the IEP invoice
  UnauthorizedSplitPenalty = 1.0 if a split move is claimed without a valid CheckPoint breadcrumb chain of length ≥ 3 within ±4 hours of the reported split time, else 0.0
  StreetTurnCreditFactor   = 0.85 when a valid street-turn GPS sequence is present and the container was dropped at an authorized location within the allowed free time window, else 1.0

FinalDecision:
  IF ReconciliationScore ≥ 0.92 THEN "APPROVED"
  ELSE IF ReconciliationScore ≥ 0.65 THEN "DISPUTED_WITH_EVIDENCE"
  ELSE "REJECTED_AND_ESCALATED"

This algorithm is implemented in both real-time (via webhook) and batch (nightly) modes inside the Exspeedite TMS rules engine. All decisions are logged with immutable audit trails for carrier defense during IEP disputes.

JSON Data Schema for CheckPoint Webhook Payload

The following schema defines the canonical payload structure used when CheckPoint pushes breadcrumb events into Exspeedite TMS. This schema is versioned and backward-compatible.

{
  "eventId": "string (UUID)",
  "timestamp": "string (ISO 8601)",
  "equipmentType": "enum(chassis|container|tractor)",
  "equipmentId": "string",
  "latitude": "number",
  "longitude": "number",
  "speed": "number",
  "eventType": "enum(ARRIVAL|DEPARTURE|SPLIT|STREET_TURN|HOOK|DROP|PER_DIEM_START|PER_DIEM_END)",
  "geofenceId": "string | null",
  "orderId": "string | null",
  "carrierId": "string",
  "source": "CHECKPOINT",
  "signature": "string (HMAC-SHA256)",
  "version": "2025.03"
}

Architectural Diagram Description

The production architecture consists of four logical tiers:

1. Ingestion Tier: CheckPoint mobile applications and telematics devices emit GPS breadcrumbs via HTTPS webhook to an API gateway fronting Exspeedite TMS. Messages are signed with HMAC and validated in under 80ms.
2. Normalization & Enrichment Tier: Exspeedite TMS maps raw events to internal load, order, and asset records. Street-turn business rules are applied and per-diem day counters are maintained in a time-series data store.
3. Reconciliation Engine Tier: The Strong Tower Intermodal Chassis Split Reconciliation Standard™ scoring algorithm executes against every incoming IEP invoice (EDI 210 or CSV). The engine produces a line-item audit report with attached GPS evidence packets.
4. Dispute & Recovery Tier: Automated dispute files are generated and transmitted back to the IEP via EDI or portal upload. All exceptions route to a senior auditor dashboard for final review. Recovery metrics are tracked in a KPI dashboard maintained by Strong Tower Consulting.

Implementation Comparison Table