Route planning for water cooler deliveries and service visits

A water cooler distributor's route is never just a list of postcodes. It is a balance of vehicle capacity, changing load weight, site access, customer availability and the reality that the roads will not look the same at 4 pm as they did at 8 am. The best routes are rebuilt frequently, not planned once and followed blindly.

1. Start with the vehicle, not the map

Route density means nothing if the vehicle cannot complete it. A 3.5-tonne van with a tail-lift, a long-wheelbase panel van, and a small city run-around have different turning circles, height limits, weight capacities and access restrictions. A route that is perfect for one is impossible for another.

Record the real constraints of each vehicle — maximum gross weight, payload after the driver and fuel, internal dimensions, tail-lift limits, and any low-bridge or narrow-road exclusions. Then assign stops that fit, rather than expecting the driver to make it work on the day.

2. Treat load weight as a moving target

A bottled-water round starts heavy and gets lighter as deliveries are made, but empties and returned equipment add weight back in. POU and boiler rounds carry fewer bottles but may include filters, spare parts and replacement machines. Service vans need space for sanitisation kits, tools and test equipment.

Plan the load in the order it will be collected and delivered, not just the total. A vehicle that is legally loaded at the depot can become overweight by the time it reaches the weighbridge if collections are not modelled alongside drops.

3. Build around customer opening hours and service windows

Every stop has a time it can actually be done. Schools, factories, offices and care homes have different opening hours, restricted access times, and site rules for deliveries. A route that ignores these windows produces abortive visits, which are the most expensive miles a distributor can drive.

Capture each customer's preferred delivery window, out-of-hours policy, and any access requirements at the site record. Then let the route optimiser treat those windows as hard constraints, not nice-to-haves.

4. Re-optimise frequently for roadworks and diversions

The fastest route on Monday is not necessarily the fastest route on Tuesday. Roadworks, temporary traffic orders, accidents and diversions change travel times constantly. A route planned once and repeated for weeks will quietly become slower, more fuel-hungry, and less reliable.

Re-optimise routes daily, or even intra-day when conditions shift. The goal is not a perfect theoretical route; it is the best practical route for the conditions that actually exist when the wheels turn.

5. Cluster by geography, then sequence by time

Group stops by postcode area or route corridor first, then sequence each cluster by customer window and predicted travel time. This prevents the common failure mode of a route that looks efficient on a map but criss-crosses the same road three times because the stops were ordered by invoice number.

6. Leave room for the unexpected

Even a well-optimised route needs contingency. Build in buffer time for traffic, difficult drops, and reactive jobs that must be added during the day. A route planned to 100% of available driver time has no capacity to absorb a single delay without missing windows.

7. Use completed routes to improve the next ones

Actual stop durations, traffic patterns, and customer access delays are valuable data. Compare planned versus actual times regularly and feed the differences back into the planning parameters. Routes get better when the system learns how long each type of stop really takes.