Final answer:
Temporary traffic control signs must be clearly visible to motorists and are generally mounted at a minimum height of 5 feet from the bottom of the sign to the roadway level, as per the MUTCD guidelines in the United States.
Step-by-step explanation:
The height at which temporary signs should be mounted above the traveled way can vary depending on the regulations of the specific region or country. However, as a general guideline, it's important to mount signs at a height where they are clearly visible to motorists and not obstructed by other objects. In the United States, for example, the Manual on Uniform Traffic Control Devices (MUTCD) states that temporary traffic control signs should be mounted at a minimum height of 5 feet (1.5 meters) from the bottom of the sign to the level of the roadway. This helps ensure that the signs are noticeable and can be navigated safely by drivers. Understanding the height requirement is crucial for maintaining road safety and aids drivers in making informed decisions while traveling.