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- W1491646468 abstract "This paper describes how Variable Message Signs (VMS) are dynamic message displays that are used both to manage traffic incidents and to provide advisory messages to drivers. One of the more common methods of displaying long messages on a Variable Message Sign is to break the message into two segments (lines) and then present each segment in a different phase. This paper refers to this as a Multiphasic (since there are several segments) Temporal (since the segments are presented at different times) Format. Biphasic Messages are defined as Multiphasic Temporal Messages with exactly two phases. Based on current research done on Multiphasic Variable Message Signs the duration of each phase is determined as follows: At least 1 second of exposure time for every word in a Multiphasic Variable Message Sign and at least 2 seconds of exposure time for every unit of information, whichever is larger. The objective of this paper is to determine if it is better to follow the above recommendations or, instead, reduce the exposure time by half and repeat the entire message twice. More specifically, let us assume that the driver, traveling at a certain speed, was able to view the Variable Message Sign for the minimum time based on the above recommendations. In this case, the authors want to determine whether it would be better to expose each phase for the recommended time or, instead expose each phase for exactly half the time recommended for that phase, but repeat the whole message twice? A number of factors can affect the performance of drivers seeing the two different formats (single or multiple presentations), including the presence of a partial obstruction of these signs by other vehicles, the order in which the phases are read by the driver, and the exposure time of the different phases of the message. The effect of these factors on performance was evaluated for Biphasic Variable Message Signs, which are the most common form of Multiphasic Variable Message Signs, using an Advanced Fixed Base Driving Simulator at the University of Massachusetts. Findings indicate equivalent or better overall driver performance across all the above conditions when the exposure times for each phase were reduced to half the recommended time but phases were repeated, when compared to each phase being displayed for the recommended exposure time but without repetition." @default.
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- W1491646468 date "2003-01-01" @default.
- W1491646468 modified "2023-09-27" @default.
- W1491646468 title "Use of Driving Simulator to Evaluate the Effect of Repetition on Variable Message Signs" @default.
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