Small Fleets Are Shrinking: Rebuild Truckload Coverage by Carrier Size

Truckload capacity can look plentiful at the national level while becoming dangerously thin on the lanes that matter. The reason is simple: a tractor is not interchangeable with every other tractor. It belongs to a carrier with a network, equipment profile, driver base, operating radius, and tolerance for difficult freight.

Recent fleet-size data makes that distinction urgent. FreightWaves reports 362,033 tractors among fleets with one to six power units, compared with 470,402 in the 20-to-100 segment and 440,430 among fleets with at least 1,000 units. The smallest segment is not merely smaller than those two groups. Its tractor count is also below its five-year average of about 378,800 and its 12-month average of roughly 364,960, according to a related FreightWaves analysis.

For shippers and brokers, this is a signal to stop treating total capacity as the same thing as usable coverage.

Why fewer small fleets create lane-level risk

Small carriers often cover freight that does not fit neatly into a national network. They may accept short hauls, irregular backhauls, rural origins, specialized appointments, or lower-volume lanes where a large fleet cannot build continuous utilization. A carrier with four tractors can be strategically important if two of them regularly serve a difficult plant-to-customer lane.

When that carrier exits the market, leases onto a larger operation, or moves to a more profitable lane, the tractors may not disappear from national statistics. Their availability to the original shipper can disappear immediately.

That is why aggregate tractor counts can give false comfort. Capacity may migrate toward larger fleets while becoming less responsive to a particular origin, commodity, or appointment window. A routing guide built around carrier names alone will not show that structural change until tenders begin to fail.

Map carrier size to actual exposure

Start by assigning every approved carrier to a consistent fleet-size band: 1-6, 7-19, 20-100, 101-999, and 1,000-plus power units. Store the source and date of the fleet count because registrations, acquisitions, and leased capacity change.

Then calculate the share of accepted tenders and completed loads contributed by each band. Do this by lane, not only across the network. A company may award just 12% of annual volume to very small fleets overall but depend on them for 65% of outbound loads from a remote facility.

Four dimensions deserve separate scores:

• Lane concentration: What percentage of primary and backup capacity comes from each carrier-size band?
• Commodity fit: Which carriers possess the equipment, insurance, handling knowledge, or certifications required for the freight?
• Appointment constraint: Can the carrier reliably meet narrow pickup, delivery, or driver-assist windows?
• Recovery capability: How quickly can the carrier provide a replacement tractor after a breakdown or service failure?

A practical concentration score should combine those factors. For example, flag a lane when one size band handles more than 60% of accepted tenders, fewer than three carriers have moved a load in the past 90 days, or no backup carrier has demonstrated the required equipment and appointment performance.

Do not confuse carrier count with redundancy

Ten carriers in a routing guide do not provide ten real options. Some may share the same geographic weakness, depend on the same load board, lack recent insurance validation, or have never accepted the lane. Others may appear in the transportation management system only because they moved one load years ago.

Measure demonstrated coverage instead. A qualified backup should have current authority and insurance, compatible equipment, an agreed rate or pricing method, valid dispatch contacts, and a recent successful movement on the lane or a comparable lane. Test backup carriers before the peak period, not during it.

This also prevents overcorrection. Moving every tender to a large fleet may improve recovery resources but reduce flexibility or create new concentration risk. The objective is a deliberate portfolio: small carriers for local knowledge and adaptability, midsize fleets for regional density, and large fleets for scale and recovery depth.

Set triggers before rejection rates spike

Tender rejection is a lagging indicator. By the time rejection rates jump, the shipper is already buying expensive spot coverage or missing appointments. Earlier triggers should release specific actions.

An onboarding trigger might open carrier recruitment when the active-carrier count on a critical lane falls below three. An allocation trigger might cap any single fleet-size band at 60% of awarded volume when alternatives exist. A performance trigger could shift 10% of tenders to a tested backup when primary acceptance falls below 90% over a rolling four-week period.

Use financial triggers as well. If spot premiums exceed the contracted rate by 15% for three consecutive loads, review the lane rather than treating each exception independently. If a small carrier's insurance, safety status, or operating authority changes, automatically pause new tenders and activate the next qualified option.

Every trigger needs an owner, action, and expiration rule. Procurement can own carrier recruitment; operations can own tender reallocation; compliance can own authority holds. Without named responsibilities, a dashboard becomes an attractive record of a problem nobody is fixing.

Build coverage as a portfolio

The 362,033 tractors in the smallest fleet segment still represent substantial capacity. But the comparison with 470,402 tractors in the 20-to-100 group and 440,430 in the largest group shows why carrier mix deserves active management. The relevant question is not whether the United States has enough trucks. It is whether the right carriers will accept the right load, in the right place, at the required time.

CXTMS helps logistics teams connect carrier qualifications, lane history, tender performance, rates, and exceptions in one operating view. That makes it easier to see concentration early and rebuild coverage deliberately. Request a CXTMS demo to turn carrier-size exposure into actionable routing and onboarding rules.