How timing windows
actually work.

Guides · 17 February 2026

ASAP versus a booked window

There are two ways to frame the timing of a job. The first is ASAP: a vehicle is dispatched as soon as it can be, and the goods are collected and delivered at the earliest moment possible. This suits a genuine rush where every minute counts.

The second is a booked window, where collection or delivery is arranged for a specific slot, such as before nine in the morning or within a set afternoon period. A window is the better choice when the goods need to arrive at a particular time rather than simply as fast as they can.

How ETAs are given

An estimated time of arrival is built from the route. Once the collection and delivery postcodes are known, the driving distance and typical road conditions give a realistic window for when the goods will land, which is shared with you and tracked as the journey unfolds.

On a dedicated, direct run the ETA tends to be tight, because the vehicle is not waiting on a hub or weaving around other drops. Live tracking then keeps that estimate honest, so if anything shifts on the road you can see it rather than being left to wonder.

What affects the timing

A handful of real-world factors shape how a window plays out. The main ones are worth keeping in mind:

• Distance, the single biggest driver of how long a run takes
• Traffic and road conditions, which vary by time of day
• Access at each end, such as security checks or booking-in
• How ready the goods are at collection and reception

None of these are mysterious, and most can be smoothed in advance. Flagging tight access or a booking-in system when you arrange the job keeps the window realistic.

Planning around a hard deadline

When there is a deadline that absolutely cannot move, the trick is to work backwards from it and build in a little headroom. Rather than aiming to arrive at the very last second, set a window that lands the goods comfortably before the cut-off.

Share that deadline clearly when you book and let the timing be planned around it, with a fixed quote before the driver sets off. A well-chosen window, a direct route and live tracking together give you the certainty that the goods will be there when they need to be.

Related