What is the suggested advanced warning sign spacing for urban areas with high speed?

In urban areas with high-speed traffic, the suggested advanced warning sign spacing is critical for ensuring that drivers have enough time to react to upcoming changes in road conditions, such as construction zones or lane merges. The recommended spacing of 350 feet allows for ample visibility and provides drivers with an appropriate distance to prepare for adjustments in speed or direction.

This distance is ideally suited for urban environments where the density of traffic and the potential for sudden stops or changes in traffic flow necessitates clear and timely warnings. The 350-foot spacing strikes a balance between providing adequate warning for vehicles traveling at higher speeds and not overwhelming drivers with excessive signage, which could lead to distraction or inattention.

Consequently, this option aligns with best practices for maintaining safety and operational efficiency on roadways within urban settings where drivers may be navigating through complex traffic conditions.