Driver Comprehension of Managed Lane Signing

S.T. Chrysler, A.A. Nelson
College Station, TX: Texas Transportation Institute
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A statewide survey of driver comprehension of managed lane signing is reported. Computer-based surveys were conducted using video clips of computer animations as well as still images of signs. The surveys were conducted in four Texas cities with a total of 142 participants. Results showed varying levels of comprehension for signs relating to pricing, occupancy requirements, and destinations. A series of guide sign banner designs was tested, as well as various methods to convey form of payment. Some results suggest that participants may have had difficulties seeing all of the details in the computer animations. Future research using this method should carefully consider the stimulus displays, resolution, and play rate of animations.