Expressway Monitoring and Advisory System
The Expressway Monitoring and Advisory System (Chinese: 电子监控与信息系统), also known by its acronym of EMAS, is a computerised system that is used to monitor traffic on Singapore's expressways. EMAS enables Land Transport Authority (LTA) personnel to detect accidents and respond to them more quickly. In addition, it notifies motorists of adverse traffic conditions.[1]
History
The contract for the construction of EMAS was awarded by the LTA to Singapore Technologies Electronics in December 1996. The first phase, implemented only on the Central Expressway, was launched officially on 21 March 1998 by then Minister of State for Communications, John Chen.[2]
The system was further expanded in its second phase to monitor tunnels of the CTE, as well as Ayer Rajah Expressway, East Coast Parkway and Pan Island Expressway. This was implemented by April 2000.[3]
The upgrading of EMAS signages was announced in September 2013. It will be rolled out to Central Expressway (both blue screens and tunnels), East Coast Parkway, and Bukit Timah Expressway/Seletar Expressway that is near to the Woodlands Checkpoint.
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.
Effectiveness and criticism
EMAS has helped LTA to detect road traffic accidents, vehicle breakdowns, and other incidents. By June 2004, LTA had removed conventional SOS telephones from all Singapore expressways (except the CTE tunnels), citing the effectiveness of EMAS and the widespread use of mobile phones as reasons. LTA reassured motorists without mobile phones that they would not be stranded without help in case of a breakdown, as the expressways are patrolled by EMAS recovery teams in two trucks every two hours. [4] [5]
However, the system has been panned by its critics who denounce it as a waste of money, with messages being couched in "unintelligible" abbreviations. For example, "Please" is shortened to "PLS" in the first picture of this article.[6]
See also
- Variable message sign
- Motorway Incident Detection and Automatic Signalling - a slightly different system in the UK
References
- ^ "Expressway Monitoring and Advisory System". Automobile Association of Singapore. Archived from the original on 2006-03-14. Retrieved 2006-04-05.
- ^ "Singapore Technologies Engineering Electronics arm delivers the most advanced Expressway Monitoring System (EMAS) to the Land Transport Authority of Singapore" (PDF). Singapore Technologies Electronics. Archived from the original (PDF) on 2005-12-14. Retrieved 2006-04-05.
- ^ "EMAS II launched" (PDF). Singapore Technologies Electronics. Retrieved 2006-04-05.
- ^ "190 SOS phones to be removed from expressways". Channel NewsAsia. 2004-05-13. Retrieved 2006-04-05.
- ^ "Removal Of SOS Telephones From Expressways". Land Transport Authority. Retrieved 2006-04-05.
- ^ "Throwing good money after high-tech". Today. 2005-05-04. Retrieved 2006-04-05. [dead link]