What is dock scheduling?

Giving each inbound or outbound truck a booked time slot at a dock door or terminal gate, so arrivals are spread out and the site can plan labour and doors around them.

Do appointment systems reduce truck waiting time?

They can. Transport Canada found them effective at reducing idling, and one simulation cut in-terminal time 48% at full use — but with little uptake it rose, and a study of Los Angeles and Long Beach found no clear reduction.

When does a wait at the dock become detention?

That is set by the contract, but the US trucking safety regulator notes the industry typically treats dwell over 2 hours at a facility as detention.

Term

Dock scheduling

Dock scheduling is booking each truck a time slot at a loading dock or terminal gate before it arrives, so arrivals spread across the day instead of queuing. Done well it cuts the time trucks wait — and the detention charges and lost driving hours that come with it. Done half-way, research shows it can make queues worse.

Also called dock appointment scheduling, dock appointments, terminal appointment system, dock bookingUpdated 12 October 2026

How appointment systems work

Transport Canada's study of terminal appointment systems describes them as letting drivers pre-register and reserve dedicated time slots for faster handling at the gate. A warehouse dock works the same way: each door has slots, carriers book them, and the site plans labour against the bookings.

What the evidence says

Transport Canada concluded appointment systems can be effective in reducing overall truck idling at terminals.
A simulation of one New York terminal it reviewed found total in-terminal time fell 48% when every truck used appointments — but rose 390% when only 5% did, with lanes reserved for them.
A 2007 study of the Los Angeles and Long Beach ports found no evidence of reduced queuing or transaction times from the appointment systems in use there.
The US trucking safety regulator notes the industry typically treats dwell time over 2 hours as detention.

Worked example: sizing the slots

Suppose a site has 8 doors open 10 hours a day, and a truck takes about 50 minutes to unload plus 10 to swap — one-hour slots.

Slots per day = 8 doors × 10 h ÷ 1 h = 80 · Book to 90% = 72 appointments, leaving 8 for late or unbooked trucks

Booking every slot leaves no room for the truck that is an hour late — and that truck then waits behind everyone else.

The mistake people make

Launching appointments without getting carriers to use them. The New York simulation shows why: reserve capacity for a few booked trucks and the unbooked majority queues longer than before.

FAQ

Dock scheduling: common questions

What is dock scheduling?: Giving each inbound or outbound truck a booked time slot at a dock door or terminal gate, so arrivals are spread out and the site can plan labour and doors around them.
Do appointment systems reduce truck waiting time?: They can. Transport Canada found them effective at reducing idling, and one simulation cut in-terminal time 48% at full use — but with little uptake it rose, and a study of Los Angeles and Long Beach found no clear reduction.
When does a wait at the dock become detention?: That is set by the contract, but the US trucking safety regulator notes the industry typically treats dwell over 2 hours at a facility as detention.