Freight Modes and Carrier Selection

Mode selection is the first decision in freight procurement — before rates, carriers, or contracts. Each mode has a distinct cost structure, transit profile, and capacity dynamic. Mismatching shipment characteristics to mode is the most common source of avoidable freight cost.

The Five Primary Modes

Truckload (TL)

• Profile: Dedicated trailer for a single shipper’s freight; point-to-point
• Weight range: 10,000–45,000 lbs (practical); 48,000 lbs legal max
• Trailer types: 53ft dry van (most common), reefer (temperature-controlled), flatbed (OD freight), curtainside
• Cost: $2.00–$4.50/mile (dry van, spot market 2024–2025 range); linehaul + fuel surcharge + accessorials
• Transit: Typically 1–3 days for lanes <1,500 miles
• Best for: Full pallet loads, time-sensitive freight, origin-destination pairs with regular volume

Less-than-Truckload (LTL)

• Profile: Shared trailer; freight rated by weight, freight class, and lane
• Weight range: 150–15,000 lbs; above 10,000 lbs TL often becomes cheaper
• Freight class: NMFC classification system (50–500); lower class = denser/less fragile = lower rate
• Cost: Typically 30–50% premium over TL on a per-cwt basis; base rate × class factor × discount
• Transit: 1–5 days; moves through carrier terminal network (multiple handlings)
• Best for: Inbound replenishment from multiple suppliers; B2B shipments below TL threshold

Intermodal (Rail + Dray)

• Profile: Container moves by rail for the linehaul; dray truck handles first/last mile
• Cost: 10–20% below TL on lanes >500 miles; dray cost offsets savings on shorter lanes
• Transit: 1–2 days longer than TL on same lane (rail schedule + dray time)
• Best for: High-volume, non-time-sensitive lanes >750 miles; lane pairs with daily rail service
• Watch-outs: Rail service variability; limited container availability during peak seasons

Parcel

• Profile: Individual package shipment through carrier sortation network
• Weight range: Up to 150 lbs (UPS/FedEx); zone and DIM-weight rated
• Cost: Zone-based + DIM weight + accessorials (residential, fuel, address correction)
• Best for: B2C e-commerce; small replenishment; emergency stock transfers
• See Parcel and Last Mile Logistics for full detail

Air Freight

• Profile: Expedited via commercial cargo or charter aircraft
• Cost: 10–15× TL equivalent; typically $2–$8/lb for domestic air
• Transit: Next-day to 3-day depending on service level
• Best for: High-value/low-weight (electronics, pharma); emergency supply disruption; perishable with short shelf life
• Rule of thumb: If the cost of the freight exceeds the value of a stockout, air is warranted

Mode Selection Decision Rules

Shipment Weight	Default Mode	Override Conditions
<150 lbs	Parcel	Time-critical → same-day courier
150–5,000 lbs	LTL	Regular lane with >3 shipments/week → consolidate to TL
5,000–15,000 lbs	LTL or TL	Compare TL all-in vs. LTL; TL often wins above 10,000 lbs
>15,000 lbs	TL	Intermodal if lane >750 miles and transit allows
>15,000 lbs, >750 miles	Intermodal	Time-sensitive → TL; irregular volume → TL spot

Carrier Selection Criteria

Criterion	Weight	What to Evaluate
Service reliability	High	On-time delivery %, claims ratio, exception resolution speed
Capacity access	High	Dedicated capacity commitment; spot market access
Transit time	Medium	Published transit days vs. actual; market comparison
Technology / EDI	Medium	EDI 214 capability; visibility platform; API connectivity
Geographic coverage	Medium	Coverage of current + planned lanes
Financial stability	Medium	Carrier financial health; bankruptcy risk
Rates	Medium	Competitive vs. market; total cost inc. accessorials

Do not over-index on rates. A carrier with 95% on-time at $3.20/mile is cheaper than one at $2.90/mile with 88% on-time once chargebacks, expedite costs, and customer deductions are included.

Carrier Relationship Tiers

Tier	Characteristics	Volume Commitment
Strategic (preferred)	Dedicated capacity; joint business planning; technology integration	75–85% of volume
Preferred	Regular lanes; contract rates; scorecarded	10–20%
Spot / transactional	Broker-sourced; market rate; no commitment	5–10%

Concentrating too much volume in a single carrier creates capacity risk. Best practice: no single carrier >40% of total freight spend.

Freight RFP Process

1. Data package: 12 months of lane-level shipment data (origin, destination, weight, accessorials, current rate paid)
2. Bid matrix: Structured rate request by lane group; include accessorial schedule
3. Evaluation: Normalize all-in cost per shipment; weight by lane volume
4. Award: Allocate lanes; include backup carrier for each strategic lane
5. Contract: Multi-year base rates with annual escalation caps; capacity commitment language; performance SLAs

Run a full RFP every 2–3 years. Mid-term benchmarking (every 12 months) using a broker or rate index validates whether contracted rates remain competitive.

Spot Market Dynamics

Spot market rates lag the contract market by 6–12 months. The van load index (DAT, Cass Freight Index) tracks spot rate trends. When spot is 15%+ below contract, consider shorter contract terms or index-linked pricing. When spot is above contract, value of committed capacity is highest — protect strategic carrier relationships.