Intermodal Drayage & Port Trucking Guide: TWIC Cards, UIIA Agreements, Chassis Inspections, and Demurrage

The Port & Rail Drayage Sector: Moving Maritime Containers Across Highway Gateways

Intermodal drayage is the vital logistical link connecting maritime ocean ports, inland river terminals, and Class 1 railroad container ramps to regional distribution warehouses and manufacturing plants. Drayage operators utilize specialized commercial day-cab tractors to transport 20-foot, 40-foot, and 53-foot intermodal shipping containers mounted on heavy-duty skeletal chassis.

While drayage routes are typically shorter in highway mileage than over-the-road long-haul trucking, the operating environment is intensely complex. Navigating high-security port terminals requires specialized federal security clearances, automated terminal appointment reservations, compliance with ocean shipping interchange contracts, and strict adherence to chassis safety statutes.

Understanding port security credentials, interchange liability, and fee structures allows motor carriers to operate profitably while avoiding catastrophic container detention charges.

• Transportation Worker Identification Credential (TWIC): Mandated by the Maritime Transportation Security Act (MTSA) and administered by the Transportation Security Administration (TSA). Drivers must hold an active biometric TWIC smart card to gain unescorted access to secure maritime port terminals.
• Uniform Intermodal Interchange and Facilities Access Agreement (UIIA): The standard commercial contract administered by the Intermodal Association of North America (IANA). Governs the legal relationship, insurance requirements, and liability assignment between motor carriers, ocean steamship lines, and railroad equipment providers.
• RFID Transponders & Port Terminal Truck Tracking: Port facilities (such as Los Angeles/Long Beach, NY/NJ, Savannah, and Houston) utilize Clean Truck check RFID tags on vehicle windshields to verify engine clean-air emissions compliance before opening automated terminal gates.
• Terminal Gate Appointment Systems: Drivers must book specific 1-to-2-hour gate arrival windows through terminal digital reservation portals to enter container yards.

Figure 6.4: Intermodal port drayage requires biometric security clearances, Clean Truck emissions compliance, and rigorous chassis roadability pre-trip inspections.

Chassis Roadability Regulations (49 CFR Part 390) and Demurrage Fee Mitigation

One of the historic challenges in intermodal drayage was driver liability for defective intermodal chassis provided by third-party chassis pools. Under the FMCSA Intermodal Equipment Provider (IEP) and Chassis Roadability Regulations (49 CFR Part 390, Subpart C), federal law places statutory responsibility on the chassis pool owner to systematically inspect, repair, and maintain equipment.

However, when a driver pulls an intermodal chassis past the terminal interchange gate (the "outgate"), the driver legally assumes operational safety responsibility under § 390.40. Performing a thorough pre-trip inspection at the "chassis roadability pit" inside the terminal before outgating is essential to avoid inheriting severe roadside CVSA violations.

• Chassis Inspection Checklist: Inspect container locking pins (twist locks securely engaged at all four corners), air brake lines, gladhands, brake pushrod stroke, tire condition (min 2/32" tread, no flat spots from terminal dragging), and working LED lights.
• Demurrage vs Per Diem (Detention): Demurrage is charged by the marine terminal when a loaded import container sits past permitted "free time" (typically 4 to 5 days). Per Diem (Container Detention) is charged by the ocean carrier when the driver holds the equipment (container/chassis) outside the terminal beyond contractual free time.
• Demurrage Escalation Costs: Demurrage fees escalate rapidly, often starting at $150 to $200 per day and climbing to over $400 per day per container.
• Equipment Interchange Receipt (EIR / Outgate Ticket): Always verify and preserve the paper or digital EIR receipt recording container number, seal number, chassis number, and exact departure timestamp.