Answers · updated August 2026

How long can a trailer sit in a yard?

The legal answer is short. The cost answer is the one that should worry you.

Reviewed August 2026 · every figure sourced, no estimates invented

Short answer: no federal law limits how long a trailer can sit in a private yard. The real limits are contractual free time, detention and per-diem clauses, and cost: idle equipment earns nothing while running a truck costs a record $2.336 per mile (ATRI, 2025). Yards that control dwell measure it first.

There is no legal time limit

No federal regulation forces a trailer off a private yard after a set number of days. Sitting time is governed by what the parties signed: lease terms, per-diem and detention clauses, and occasionally local zoning or fire-lane rules. At the dock, free time of about 2 hours is the contractual norm (US DOT OIG, 2018), and detention typically bills $50 to $125 per hour.

The telling exception is rail. Under 49 CFR Part 1250, railroads must report terminal dwell every week. Truck yards face no such requirement, which is why most cannot answer this question about their own lot.

What actually limits sitting time: cost

Benchmark	Figure	Source
Local container dwell, San Pedro Bay ports	2.75 days average	PMSA, Sept 2025
Average driver dwell at facilities	3.4 hours, of which 1.4 hours exceed the free window	FMCSA
Typical contractual free time	About 2 hours	US DOT OIG, 2018
Marginal cost of running a truck	$90.89 per hour, $2.336 per mile (record high)	ATRI, 2025
Dwell reporting requirement	Rail: weekly, mandatory · Truck yards: none	49 CFR Part 1250

Example scenario, not a measured average: a driver held 1.4 hours past the free window, the FMCSA average overage, represents roughly $127 of marginal operating cost at ATRI's $90.89 per hour, before any detention invoice is written.

Nobody measures truck-yard dwell, and regulators admit it

The US DOT Inspector General put it plainly in 2018: "accurate industrywide data on driver detention do not currently exist." The same audit estimated that each 15-minute increase in average dwell raises expected crash rates by 6.2%. ATRI's 2024 study found detention on 39.3% of stops, costing the industry about $15B a year. Ports publish dwell. Railroads must report it weekly. The truck yard, where trailers actually sit, is the one link in the chain that runs unmeasured.

How to put a number on your own yard

The fix is not a policy, it is a timestamp. Record every gate-in and gate-out and dwell stops being an argument. That is the core of what Vantage does: the gate clerk's phone captures the trailer number with 5-stage AI validation, every move gets a timestamp, and dwell per trailer becomes a report instead of a guess, from $149 a month with a 14-day free trial and no fixed hardware. The sourced figures above live in the 2026 yard & detention benchmarks, and the free savings calculator turns your truck volume into hours and dollars.

FAQ

Is there a legal limit on how long a trailer can sit in a yard?

No. Federal law sets no maximum sitting time on private yards; the limits come from contracts: free time, detention and per-diem clauses, leases, and local ordinances. Railroads must report dwell weekly under 49 CFR Part 1250; truck yards have no equivalent requirement.

How much does it cost to let a trailer sit?

No industrywide figure exists; the US DOT Inspector General said as much in 2018. Benchmarks that do exist: $90.89 per hour and $2.336 per mile to run a truck (ATRI, 2025), and contract detention of $50 to $125 per hour.

How long do containers actually sit at ports?

PMSA reported local container dwell at the San Pedro Bay ports averaging 2.75 days in September 2025, one of the few dwell figures published on a recurring basis anywhere in the chain.

Know your dwell before it bills you

Start a 14-day trial or watch the phone-based gate in 90 seconds. Published pricing, no discovery call.

Start free trial Watch the demo