Which unit is used for pedestrian design speed in the provided material?

Which unit is used for pedestrian design speed in the provided material?

• A. m/s
• B. fps
• C. km/h
• D. mph

Answer: (B)

Pedestrian design speed is expressed in feet per second because the design framework in the material uses imperial units, linking walking performance directly to distances measured in feet and time in seconds. This makes calculations intuitive: a typical walking speed is about 3 to 4 ft/s, so estimating crossing times or sidewalk encounter rates becomes straightforward by dividing a width (in feet) by the design speed (in ft/s). Using feet and seconds together keeps all pedestrian-scale design measurements consistent with the rest of the roadway geometry that also relies on feet. Other units, like meters per second or miles per hour, would require conversions and mix metric or vehicle-oriented scales with the pedestrian design process, making calculations less convenient in this context.

Pedestrian design speed is expressed in feet per second because the design framework in the material uses imperial units, linking walking performance directly to distances measured in feet and time in seconds. This makes calculations intuitive: a typical walking speed is about 3 to 4 ft/s, so estimating crossing times or sidewalk encounter rates becomes straightforward by dividing a width (in feet) by the design speed (in ft/s). Using feet and seconds together keeps all pedestrian-scale design measurements consistent with the rest of the roadway geometry that also relies on feet. Other units, like meters per second or miles per hour, would require conversions and mix metric or vehicle-oriented scales with the pedestrian design process, making calculations less convenient in this context.