Investigation into the effects on motorist’s behaviour from electronic speed advisory signage

Six electronic speed advisory signage (ESAS) installations are currently installed on major roads and they are designed to assist drivers to assess the accuracy of their speedometers and adhere to the relevant speed limit. An investigation into the effect of the ESAS on driver behaviour found that they had the same impact on driver behaviour as the fixed speed camera system. Drivers were using the signage to check on speed with some being reassured that they are travelling under or at the speed limit and others reducing their speed once they are detected as travelling above the speed limit.

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