January 2001

Expressway Monitoring and Advisory System

If you have been driving towards and along the major expressways, you would have noticed the electronic signboards providing traffic information.

Launched on 21 Mar 98 on the Central Expressway (CTE), the Expressway Monitoring and Advisory System (EMAS) has been extended to cover most of the major expressways since then.

EMAS is the mechanism utilised by the Land Transport Authority to manage traffic on expressways. It is a state-of-the-art system incorporated with sophisticated technology to monitor traffic conditions on the expressways, providing motorists with up-to-date traffic information that would help ensure a safe and stress-free drive along the expressways.

Strategically-located cameras pick up adverse traffic conditions and transmit the information to the operators manning the 24-hour Control Centre for further action. There are two kinds of cameras. The detection cameras act as traffic sensors to pick up unusual traffic flow that is caused by accidents, congestion and vehicle breakdowns and subsequently sends an automatic alert to the staff at Control Centre. The operators will then make use of the surveillance cameras, which act as remote eyes to zoom in on these conditions. Motorists are given advance warnings on these adverse road conditions through electronic signboards and via radio announcements and TV broadcasts.

In the meantime, EMAS recovery crew would have been dispatched to reach the affected areas within 15-minutes, to tow the stalled vehicles to the nearest designated car parks and assist in managing traffic. There are also SOS phones, placed along the expressways for motorists in distress to get help from the Control Centre.

Be sure to catch the next issue of The Highway, when we tell you what the various symbols used in EMAS means.