Tyres should be checked for pressure levels and general wear; such as cracks, splits or bulges, and most importantly, tread depth. Although the minimum tread level is 1.6mm, during winter it’s advisable to have 3mm of tread to help with traction and grip.
The rubber on windscreen wipers can also be prone to splits so its important that these are checked too to ensure they’re fit for purpose.
Again, it sounds obvious but your drivers should check their vehicles’ lights are working and the fittings are clean, it’s essential for them to see and be seen.
Vehicle batteries have to work twice as hard during the winter months. If the vehicle’s battery is over four years old it may be reaching the end of its life and it could let your driver down.