What is the recommended advanced warning sign spacing for urban areas with low speed?

The recommended advanced warning sign spacing for urban areas with low speed is typically set at 100 feet. This distance is considered adequate in urban settings where speeds are lower and drivers have a shorter distance to react to changes in road conditions or hazards. In lower-speed environments, such as residential or commercial districts, a shorter spacing allows for more immediate awareness of potential dangers ahead, ensuring that drivers have sufficient time to adjust their speed and navigation safely.

Longer spacings, such as 150 feet, 200 feet, or more, are more appropriate for higher-speed environments where drivers have a longer reaction time due to increased speeds. Therefore, a spacing of 100 feet is tailored specifically for situations where rapid awareness and response are crucial in managing safety effectively in urban low-speed areas.