Drayage in Charleston is its own kind of trucking. You might run three or four turns a day between a marine terminal and a warehouse in Summerville or Ladson, sit in a gate line on the Wando, drop a loaded box at a transload yard off I-26, and finish the day pulling an empty back to a depot. The miles are short, but the exposures are dense: heavy, sealed boxes you never loaded, chassis you do not own, congested interchanges, terminal rules, and a hurricane season that can shut the port down for days.
This guide breaks down the insurance a Port of Charleston drayage operation needs, why the terminals and equipment providers ask for what they ask for, and how to avoid the coverage gaps that catch port truckers after a claim.
How Drayage Works at the Port of Charleston
The South Carolina Ports Authority runs several terminals around Charleston Harbor, and draymen work all of them:
- Wando Welch Terminal in Mount Pleasant, a major container terminal across the Cooper River from downtown. Getting there means the I-526 corridor and the Don Holt Bridge, one of the most congested freight stretches in the region.
- Hugh K. Leatherman Terminal in North Charleston, the newest container terminal, built on the former Navy base and served by a dedicated port access road connecting to I-26.
- North Charleston Terminal, a container terminal close to I-26 and the warehouse clusters along the Ashley Phosphate and Palmetto Commerce corridors.
- Columbus Street Terminal in downtown Charleston, known for roll-on/roll-off vehicle traffic and breakbulk cargo.
The harbor's 52-foot channel lets the largest container ships call fully loaded, and that volume feeds a dense network of distribution centers in Berkeley, Dorchester, and Charleston counties. Most of your loaded moves will run inland on I-26 toward Summerville, Jedburg, Ridgeville, and Orangeburg, or out to warehouses along US-78 and US-52. Our Charleston truck insurance page covers the broader local market.
The Risks That Make Drayage Different
You haul boxes you never saw loaded
An ocean container is packed overseas and sealed. You cannot check the load securement, weight distribution, or even whether the declared weight is accurate. A box that is overweight or loaded heavy to one side can shift on the I-526 ramps or the cloverleaf at I-26 and cause a rollover. If something inside is damaged, the question of whether it happened on your truck or on the ship becomes a claims fight.
You pull equipment you do not own
Most chassis in Charleston come from chassis pools or equipment providers, and the container belongs to a steamship line or leasing company. When that equipment is in your possession, you are responsible for damage to it under the interchange agreement you signed. Standard physical damage on your tractor does not cover it.
Short miles, lots of exposure
Drayage trucks rack up many starts, stops, turns, and backing maneuvers per mile. Terminal yards, tight warehouse docks in older North Charleston industrial areas, and stop-and-go traffic on Rivers Avenue and Dorchester Road all raise the odds of low-speed collisions and property damage.
Weather and storm closures
Charleston sits in hurricane country. When a storm threatens, terminals close, I-26 eastbound lanes can be reversed for evacuation, and boxes sit in yards exposed to wind and storm surge. Flooding in low-lying areas of the Neck and North Charleston can damage trucks parked at home or at a yard.
Primary Liability: What Terminals and Brokers Expect
Containers moving to or from the port are generally part of an interstate or international move, which means federal rules apply even if your trip never leaves the Lowcountry. The federal minimum for general freight is $750,000, but that number rarely gets you through the gate in practice.
The Uniform Intermodal Interchange and Facilities Access Agreement (UIIA), which most equipment providers use, sets minimum insurance requirements for participating motor carriers, commonly including $1,000,000 in auto liability. Individual steamship lines and equipment providers can add their own requirements through addenda. Before you sign up, pull the current UIIA requirements and any addenda for the lines you plan to haul for.
Your primary liability coverage is the base of the program. It pays for injuries and property damage you cause to others and carries the MCS-90 endorsement. NITIC files your proof of coverage with FMCSA, and our guide to FMCSA insurance filings explains the forms involved.
Trailer Interchange and Non-Owned Trailer Coverage
This is the coverage drayage operators most often get wrong. When you pull a chassis and container under an interchange agreement, you are contractually on the hook for physical damage to that equipment. Two coverages can address it:
- Trailer interchange insurance covers physical damage to non-owned trailers and chassis in your care under a written interchange agreement. It applies whether the equipment is hooked to your tractor or dropped in a yard. This is the coverage the UIIA expects.
- Non-owned trailer coverage protects borrowed or leased trailers when they are attached to your truck at the time of loss, and does not require a written interchange agreement.
For Charleston drayage, trailer interchange is usually the right tool because you constantly drop boxes at customer warehouses and transload yards. If a container is damaged in a storm while sitting at a customer's dock with no tractor attached, non-owned trailer coverage alone would not respond. Set your interchange limit high enough to cover a chassis plus the container, and confirm it meets what your equipment providers require.
Cargo Coverage for Container Freight
What is inside the box can be worth far more than the truck pulling it. Charleston imports include furniture, retail goods, appliances, tires, machinery, and auto parts, and exports include finished vehicles, paper products, chemicals, and agricultural goods. Motor truck cargo insurance pays when freight in your care is damaged or stolen.
A few drayage-specific points to watch:
- Limit. Many brokers ask for $100,000, but a container of electronics or machinery can exceed that. Check your typical load values.
- Exclusions. Read the policy for exclusions on unattended vehicles, specific commodities, or theft from unlocked equipment. Containers dropped overnight at unsecured lots are a theft target.
- Seal documentation. Record seal numbers at pickup and delivery. If a seal is intact at delivery, it supports the position that damage happened before you took possession.
- Reefer containers. Refrigerated containers come with gensets or plug in at the terminal. If you haul reefer boxes, ask about refrigeration breakdown coverage for spoilage caused by mechanical failure.
Physical Damage, General Liability, and Bobtail
Physical damage coverage protects your own tractor from collision, theft, fire, flood, and wind. In Charleston, the comprehensive portion matters as much as collision because of flood and storm exposure. Ask where your truck is garaged and whether that location floods.
General liability covers incidents that are not auto accidents: a driver damaging a customer's dock door, a slip-and-fall during a delivery, or damage at a warehouse while you are not operating the truck. Some warehouses and terminals require it on your certificate.
If you are an owner-operator leased onto a drayage company, the company usually carries the primary liability. You need non-trucking liability for times you drive the truck off dispatch, such as heading home after your last turn.
Leased-on drivers should also read the lease for chargebacks. Some drayage companies pass interchange deductibles, cargo deductibles, or terminal damage charges back to the driver. If your lease does that, you want to know before the first claim, not after.
Coverage Snapshot for Charleston Draymen
| Coverage | What it protects | Who typically asks for it |
|---|---|---|
| Primary auto liability | Injury and damage you cause to others | FMCSA, UIIA, brokers, beneficial cargo owners |
| Trailer interchange | Non-owned chassis and containers in your care | Equipment providers under UIIA |
| Motor truck cargo | Freight inside the container | Brokers and shippers |
| Physical damage | Your own tractor | Lenders and lessors |
| General liability | Non-driving incidents at docks and premises | Warehouses and some terminals |
| Non-trucking liability | Off-dispatch driving for leased-on operators | Motor carriers you lease onto |
Practical Steps to Keep Drayage Claims Down
- Inspect the chassis before leaving the terminal. Check tires, lights, brakes, twist locks, and mudflaps. Report defects before you roll out, and document the condition with photos.
- Lock every twist lock. An unsecured container separating from a chassis is a catastrophic claim. Make the walk-around a habit on every turn.
- Know the weight. If a box feels heavy or the paperwork looks wrong, get it weighed. Overweight boxes create both safety and legal exposure.
- Plan around I-526. Backups near the Don Holt Bridge and the I-26 interchange cause many rear-end collisions. Leave following distance and avoid peak windows when you can.
- Secure overnight drops. Use locked, lit, fenced yards. Theft of loaded containers and chassis tires happens around the port.
- Have a hurricane plan. Know where your truck goes when a storm is coming and how you will handle boxes in your possession when the terminals close.
- Keep TWIC and paperwork current. Terminal access requires a valid TWIC card, and missed appointments cost you turns.
What Charleston Drayage Insurance Costs
For a clean-record driver, commercial truck insurance in South Carolina averages roughly $11,200 to $14,200 per year, based on our own state data. Drayage pricing can land differently depending on how many trucks you run, your loss history, the value of the freight you move, and how much trailer interchange and cargo limit you need. The best way to know your number is to get a quote built around your actual terminals, lanes, and equipment providers. See South Carolina commercial truck insurance requirements for the full state overview.
Frequently Asked Questions
Is a local Charleston drayage move considered interstate?
Usually, yes. A container arriving from overseas or headed for export is generally treated as part of a continuous interstate or international move, even if your leg stays inside South Carolina. Confirm your situation with FMCSA, but most port draymen operate under federal authority.
Does my physical damage policy cover the chassis I pull?
No. Physical damage covers equipment you own and list on the policy. Chassis and containers you pull under an interchange agreement need trailer interchange coverage.
How much trailer interchange coverage do I need?
Enough to replace the most valuable chassis-and-container combination you pull, and at least what your equipment providers require in the UIIA and their addenda. Ask your insurer to compare your limit against those requirements.
Who pays if the cargo was damaged before I picked up the container?
If the damage happened before you took possession, it should not be your responsibility, but proving that can be difficult. Intact seals, photos at pickup, and clean delivery paperwork are your best defense.
Do I need general liability for drayage?
It is not federally required, but many warehouses and some terminal agreements ask for it. It also covers non-driving incidents your auto policy would not.
Running containers out of Charleston? Get a drayage insurance quote built around your terminals and equipment providers, or call (800) 726-8376 to talk with our team about liability, interchange, and cargo limits that keep you moving through the gate.