A highway hedge trimmer is a vehicle specifically designed for trimming the green fences on both sides of highways. The design concept mainly considers the following aspects:

1. Safety: The highway hedge trimmer needs to drive on the highway, so safety is the primary consideration in design. Vehicles need to have stable driving performance to avoid accidents on highways. At the same time, the vehicle needs to have a good field of view so that the driver can clearly see the road ahead.

2. Efficiency: The highway hedge trimmer needs to complete a large amount of trimming work in a short period of time, so efficiency is an important consideration in design. The vehicle needs a powerful power system that can quickly complete trimming work. At the same time, vehicles require pruning tools that can effectively trim green hedges.

3. Environmental friendliness: Highway hedge trimmers need to drive on highways, so environmental friendliness is an important consideration in design. Vehicles need to have the characteristics of low noise and low emissions to avoid polluting the environment.

4. Operability: The highway hedge trimmer requires manual operation, so operability is an important consideration in design. The vehicle needs to have a simple and easy-to-use operating interface that allows operators to easily control the vehicle. At the same time, vehicles need to have good comfort to enable operators to maintain good condition during long periods of work.

In summary, the design concept of the highway hedge trimmer mainly considers factors such as safety, efficiency, environmental friendliness, and operability to meet the needs of hedge trimming on highways.