The objective of this project was to evaluate and produce uniform recommendations for Advisory Exit and Ramp Speed signs (W13-2 and W13-3) and Combination Horizontal Alignment/Advisory Exit and Ramp Speed signs (W13-6 and W13-7), including basis for speed designation, use of “Exit” versus “Ramp,” effects of sign placement, and optimization of sign sequence. The research team used a three-phase approach, which included a literature and state-of-practice review, a laboratory comprehension study, and a field study. Additional signs, such as Horizontal Alignment Warning signs with Advisory Speed plaques, that are commonly used in conjunction with Advisory Exit and Ramp Speed signs were also evaluated.

Recommended citation: Federal Highway Administration, Evaluation of Advisory Exit and Ramp Speed Signs (Washington, DC: 2024) https://doi.org/10.21949/1521582