Winter does not create new vehicle problems; it finds the ones that were already there. The marginal battery that started fine in October, the wipers smearing since August, the screenwash bottle topped up with plain water - winter converts all of them into stranded trucks and late deliveries. The Highway Code’s maintenance annex and its adverse weather rules together form a ready-made winter checklist, and the fleets that work through it in autumn are the ones still moving in January.
The Code’s ‘before winter’ instruction is specific: ensure the battery is well maintained and that there are appropriate anti-freeze agents in your radiator and windscreen bottle. Three items, all failure-prone. Batteries lose cranking power as temperatures fall, and the commercial vehicle battery that was ‘fine’ in summer becomes the 6am no-start in December - testing battery condition before winter is far cheaper than roadside jump-starts. Antifreeze concentration in the cooling system needs checking, not assuming; a frozen radiator is an engine-ending event. And the windscreen bottle needs proper screenwash at winter concentration, because the salt film thrown up from treated roads can blind a windscreen in minutes on a wet motorway - a vehicle that cannot wash its screen in winter traffic is a vehicle being driven half-blind, illegally.
The weekly checks the Code sets out all year become urgent in winter: tyre pressures checked weekly when tyres are cold (pressures drop with temperature, and under-inflation hurts exactly the grip winter needs); fluid levels checked at least weekly; lights, indicators, reflectors and number plates kept clean and clear - winter road film coats lights and plates within miles, and the rules requiring them clean and legible do not relax for the season. Wipers and washers, already on the Code’s special-care list, move from background items to daily essentials.
The Highway Code’s adverse weather rules put hard duties on the driver before the wheels turn. Rule 228: in winter, check the local weather forecast for warnings of icy or snowy weather, and do not drive in these conditions unless your journey is essential; if it is, take great care and allow more time. The same rule prescribes the emergency kit: de-icer and ice scraper, torch, warm clothing and boots, first aid kit, jump leads and a shovel, together with a warm drink and emergency food in case you get stuck or your vehicle breaks down. For professional drivers facing a long trunk route through a forecast warning, that kit list is the difference between a miserable delay and a dangerous night.
Rule 229 states the pre-departure visibility duties in terms that carry MUSTs: you MUST be able to see, so clear all snow and ice from all your windows; you MUST ensure that lights are clean and number plates clearly visible and legible; make sure the mirrors are clear and the windows are demisted thoroughly; and remove all snow that might fall off into the path of other road users. That last item is the one winter exposes every year - the sheet of snow sliding off a van or trailer roof at the first braking is not a curiosity but a hazard the driver was required to remove. Also check the planned route is clear of delays and that no further snowfalls or severe weather are predicted.
For fleets, winter preparation is an operational event with a date on it, not a vibe. The autumn service round - batteries tested, antifreeze checked, wipers and screenwash stocks renewed, winter kit issued to every cab - converts the Code’s individual duties into a fleet system. Dispatch discipline matters too: rule 228’s ‘essential journey’ test applies to commercial journeys, and a planner who routes a truck into a forecast blizzard for a non-urgent delivery has failed the driver, not served the customer. Allow the extra time the Code mentions rather than holding drivers to summer schedules; the late-but-safe delivery beats the jackknifed artic on every measure.
And keep the records: the winterised inspection, the issued kit, the driver’s morning clearance check on the walkaround - the same evidence trail that proves diligence in any other season.
Winter readiness is the Code’s list, done early: battery, antifreeze, screenwash, tyres, lights and wipers on the vehicle; forecast checks, full clearance of glass and snow, and the emergency kit for the driver; realistic planning from the office. The fleets that prepare in autumn are the ones whose trucks - and drivers - come through winter intact.
Winter readiness lives in small cab-level habits that fleet systems easily miss. Screenwash consumption rises sharply in salted-road conditions, so bottles need checking far more often than the weekly rhythm - a driver running dry on a spray-soaked motorway faces the Code’s visibility duties with no means to meet them. Ice scrapers and de-icer walk out of cabs all year and are missing exactly when first needed, which is why the kit check belongs on the winter walkaround rather than in an autumn memory. And door seals, locks and steps ice over: a squirt of suitable lubricant in autumn beats a driver forcing a frozen door handle at 5am. None of this appears in a service schedule - all of it decides whether a winter morning starts on time.