Final answer:
There is not a universally standard distance specified in meters for the space to be left between large commercial vehicles on the highway; safe following distance is usually guided by the '3-second rule' or similar local road safety regulations.
Step-by-step explanation:
When driving a large commercial vehicle on the highway, the question of how much space must be left between your vehicle and other large commercial vehicles does not have a universal answer in the form of a specific distance in meters, such as 40 meters, 50 meters, 60 meters, or 70 meters, without context-specific traffic regulations provided. Proper safety measures dictate maintaining a safe following distance according to the speed and road conditions, which can often be quantified as following the '3-second rule' or more under certain conditions for large commercial vehicles. To find a more precise answer, you would need to refer to local traffic laws or guidelines for commercial driving in the specific jurisdiction in which you are operating.