Which of the following is a factor in determining speed limits?

• A. Weather
• B. Engineering and traffic investigations
• C. Vehicle type
• D. Pedestrian density

Answer: (B)

Speed limits are set based on engineering and traffic investigations that examine how the road is designed and how traffic uses it. These studies look at road geometry, sight distance, curves, grade, pavement quality, and how drivers actually behave on that stretch, along with traffic volumes and crash history. The aim is to choose a limit that matches safe operating speeds for most drivers while allowing smooth traffic flow. Weather, vehicle type, and pedestrian density affect safety and may lead to temporary advisories or special rules, but they are not the main factor used to establish the posted limit.