In rural areas, what is the recommended spacing for advanced warning signs?

In rural areas, the recommended spacing for advanced warning signs is typically set at 500 feet. This distance is designed to give drivers adequate time to respond to the upcoming conditions, such as road work or detours, that the signs are indicating. The extra distance in rural settings is particularly important, as these areas often have higher speed limits and less frequent distractions than urban settings, allowing the driver to notice and react accordingly to the signs ahead. The aim of this spacing is to enhance safety by reducing the likelihood of sudden maneuvers that could lead to accidents.