I’ve noticed that in particularly windy parts of the country, two traffic cones are used at a time, one purely being employed to hold the other one down in high winds. It occurred to me that it would be better to equip each cone with a moulded-in compartment into which water could be poured from the cone laying truck. The weight would allow each cone to stay securely in place in even the wildest weather.
When the roadworks have been completed (it does happen sometimes) a plug could be pulled before loading cones back aboard.
An alternative, involving no extra weight, would be for the base of each cone to incorporate an inverted aerofoil moulding which, as the wind rises, would suck it down harder onto the tarmac (a similar process to the ‘wings’ on F1 racers). This would also be a useful addition to the existing wheelie bin designs which routinely overturn in the wind, spilling household waste all over the pavement.