What route density means
Route density describes how close together a driver’s stops are. A dense route has many stops within a small area, so the driver spends most of the shift delivering and relatively little driving between addresses. A sparse route has stops far apart, so a large share of the shift goes to travel.
The most common measure is stops per hour (sometimes parcels per hour, or stops per route). It is not the only measure, because a stop can involve one parcel or several, but it gives a quick picture of how productively a driver’s time is used.
Why it drives cost
A delivery vehicle and driver cost an amount per hour, made up of wages, fuel, vehicle cost, insurance and overhead. That amount is largely fixed whether the driver makes many stops or few. So the cost per stop is roughly the hourly cost divided by stops per hour.
A simple worked example
Suppose, purely for illustration, a driver and van cost 40 per hour in total.
- At 20 stops per hour, the cost is 40 / 20 = 2.00 per stop.
- At 10 stops per hour, the cost is 40 / 10 = 4.00 per stop.
- At 5 stops per hour, the cost is 40 / 5 = 8.00 per stop.
Halving the stops per hour doubles the cost per stop. If each stop has two parcels, those figures per parcel become 1.00, 2.00 and 4.00. These are not real market prices; they are numbers chosen to make the division easy to follow. Actual costs and stop rates vary widely with location, vehicle and parcel type.
The key point is that productivity changes cost in inverse proportion. Gaining a few stops per hour on an already dense route helps. Losing a few stops per hour on a sparse route hurts more than it may appear.
What affects density
Geography. City centres and apartment blocks give high density. Spread-out suburbs and countryside give low density. This is why rural delivery charges tend to be higher.
Volume in an area. More parcels in one postcode, from one carrier, means more stops can be grouped. A carrier with a large share of local volume often has denser routes than a smaller rival. This is one reason regional carriers can sometimes be competitive in their home territory.
Delivery type. Offering narrow delivery windows can reduce density, because the driver must visit stops at set times instead of in the most efficient geographic order.
Failed attempts. A missed delivery uses a stop and then generates another one later. The cost of both falls on a single parcel.
Stop time. Not all stops are equal. A parcel left at a reception desk is quicker than one needing a signature on the fifth floor with no lift. Density counts stops, but time per stop also matters.
Parcel size. Bulky items take longer to unload and reduce how many a van can carry per round, so the density benefit is less.
How carriers raise density
- Route planning software. Good route optimization groups addresses and orders stops to cut driving time.
- Fixed delivery days by area. Some services deliver to a postcode on set days, so volume is concentrated rather than scattered through the week.
- Pickup points and lockers. Many parcels are delivered to one place, a very dense stop.
- Shared networks and handovers. Parcels from different senders are combined in the same local network.
- Smaller vehicles in dense areas, such as bikes, where parking time otherwise drags down productivity.
- Customer incentives. Slower delivery options give the carrier flexibility to build fuller routes.
What this means for shippers
You do not control a carrier’s routes, but some of your choices influence density. Offering a cheaper, slower delivery option, accepting fewer delivery days, or encouraging pickup-point delivery can all help the carrier build fuller routes, and may be reflected in price. Where your customers are concentrated also matters: a seller whose buyers are mostly in a handful of cities will often get better pricing than one with buyers scattered across remote areas, even if total volume is the same.
Route density also helps explain surprising price differences. Two destinations at the same distance from the depot can cost quite different amounts to serve, because one lies on a busy route and the other does not. When you read carrier service guides and surcharge lists, many of the charges for remote or residential addresses are simply a way of pricing low density.