Mechanism
EMAS consists of a network of electronic cameras and LED signboards located at strategic points along the expressways. The cameras transmit data to the ITS Centre, located at Clemenceau Avenue. In the Centre, staff monitor the data 24 hours a day, looking out for signs of accidents. When an accident occurs, the appropriate agencies, such as the Traffic Police and SCDF, are notified. Warning messages are then displayed on the signboards to inform motorists of the accident and allow them to make alternative travel plans. When the expressways are free of accidents, the signboards are used to display other informational messages, such as road safety reminders, planned road closures, or road works.
As part of EMAS phase 2, smaller signboards were installed on the expressways as well as arterial roads that connect to them. These smaller signboards were intended to display the estimated travel time to various destinations, in addition to information messages. The estimated travel time display was removed in April 2003 due to public protests that it was a frivolous feature, but the feature since has been recently restored.
Read more about this topic: Expressway Monitoring And Advisory System
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