The signal bar v1.0 that you've described sounds like a versatile and useful implement for agricultural or oversized load transportation.
With a price of $2,000 and a weight of 370 kg, it seems like a sturdy and reliable piece of equipment. The ability to choose between different sign options like "Convoi Agricole", "Oversize Load", "Wide Load", or a 3-point attacher gives flexibility for different transport needs.
The color choice option for the main part and extendable part allows for customization and visibility. The extendable feature from 2m to 4m is particularly practical as it can accommodate varying load sizes, making it suitable for a range of transportation tasks.
Overall, the Signal Bar v1.0 seems like a valuable addition to any farming or transportation operation, offering functionality, adaptability, and safety in handling oversized loads.