CST Level 1 Land Surveyor Certification Practice

What is the typical speed limit in construction zones on highways?

1. 25 mph

2. 35 mph

3. 45 mph

4. 55 mph

The correct answer is: 45 mph

The typical speed limit in construction zones on highways often varies by state and specific project circumstances, but a common standard in many areas is 45 mph. This speed is chosen to balance safety with efficiency, allowing for the safe movement of vehicles through potentially hazardous areas while still maintaining reasonable traffic flow. In construction zones, workers and equipment are frequently in close proximity to moving traffic, necessitating lower speeds to minimize the risk of accidents. A speed limit of 45 mph allows enough margin for drivers to react to sudden changes and hazards while navigating these zones, where conditions might be less predictable than on standard roadways. Other options such as 25 mph and 35 mph are generally seen in more restricted areas or residential zones, while 55 mph could be too high given the increased risks associated with construction work occurring directly alongside traffic. Thus, 45 mph serves as an effective compromise, providing a manageable speed that enhances safety without causing significant delays.