When a size or weight limit is exceeded, most countries require a special transport permit for road movement. The permit sets the route, the permitted hours and often the escort conditions. The size above which a permit is needed, who provides the escort and how, and the restrictions on night or weekend movement differ from country to country. Instead of stating a general rule, the current regulations of each country should be confirmed with the competent authority on every shipment.
On a multi-country route, do not assume that the same regime applies at every border. A permit issued by one country may carry no weight in the next, and applications are specific to the cargo and the route. Konsol Logistics lists permit and escort needs at the planning stage, coordinates them with the relevant partners and tells you which document stands at which stage before loading.
Expert note: The permit process quietly sets the calendar. Ask about permit and escort requirements before you fix the shipping date. Arriving on loading day to find that the vehicle does not match the permit causes far more trouble than setting the date correctly in the first place.