Expressway Monitoring Advisory System (EMAS)

Expressway Monitoring Advisory System (EMAS) is an intelligent incident management tool that manages traffic along our expressways. It detects accidents, vehicle breakdown and other incidents promptly, ensuring fast response to restore normal traffic flow. It also provides real-time information of travelling time from the entry point of expressway to selected exits.

What are the benefits of EMAS?

EMAS brings these benefits to motorists:

photo of EMAS Signage

  • Provides quick response to motorists who need help along expressways
  • Minimises congestion that may arise from incidents through the display of messages to the public to avoid incident locations
  • Enhances overall safety on expressways


Fast response to incidents

When a traffic incident is detected, the LTA Operations Control Centre (OCC) will dispatch an EMAS Vehicle Recovery tow truck and LTA Traffic Marshal to the incident site, as part of the incident management process. The EMAS Vehicle Recovery crew and LTA Traffic Marshals will arrive quickly and work together to expedite the process of clearing incidents on expressways so as to bring traffic flow back to normal as fast as possible.

The recovery crew will also tow the broken-down vehicle to the nearest designated carpark, free of charge. With effect from 18 January 2006, it is an offence if a vehicle owner refuses to allow his vehicle to be towed away by the recovery crew, even if the owner is waiting for his own tow truck service that has yet to arrive. This is to minimise the congestion and inconvenience caused to other motorists.
EMAS Tow Truck


Working closely with the vehicle recovery service crew, a team of LTA Traffic Marshals (who are Auxiliary Police Officers) carry out On-Scene Management duties like traffic control and evidence preservation for accidents involving minor injuries. This is to improve on the accident clearance time, especially for minor accidents. The Traffic Police (TP) will continue to handle all accidents involving injuries and fatalities as well as enforce traffic offences.

Keeping other motorists informed

Motorists are informed of the traffic condition so that they can drive more carefully as they approach the incident site or choose another route. Electronic signboards along the expressways and adjacent major roads display messages on the traffic situation ahead. Traffic information is also sent to TrafficWatch (MediaCorp Radio) for broadcast, and disseminated on OneMotoring Traffic News (hyperlink to Traffic News page), mobile app and LTATrafficNews Twitter platform.

Enhancement of EMAS

Since Nov 2014, motorists have been able to obtain real-time traffic updates via both textual messages and simple graphics display up to seven colours, i.e. green, red, blue, cyan, purple, yellow and white, on the enhanced electronic signboards (also known as Variable Message Signs or VMS) along the following expressways:

•    Ayer Rajah Expressway (AYE)
•    Bukit Timah Expressway (BKE)
•    Central Expressway (CTE)
•    East Coast Parkway (ECP)
•    Kranji Expressway (KJE)
•    Pan Island Expressway (PIE)
•    Seletar Expressway (SLE)
•    Tampines Expressway (TPE)

In-addition, colour-coded travel time information are displayed on the enhanced electronic signboards located prior to entry and along the above expressways. The enhancement of the signboards improves the readability of the messages and allows motorists to make better informed travel decisions through graphical and colour representations.

The enhanced electronic signboards are part of the overall upgrading work for the entire EMAS on the expressway network that LTA is undertaking. The signboards along the expressways have been enhanced and the entire enhancement project has been completed.

Expanding coverage to Arterial Roads

Besides upgrading the existing EMAS signs on expressways, LTA has extended the  EMAS scheme to ten major arterial road corridorsThe extension of the EMAS coverage to major arterial road corridors brings about better information dissemination and, consequently, better traffic flow on the road network island-wide.

Related Information

Understanding graphical EMAS messages and colour coded travel time

Traffic Incidents on Expressways

EMAS VRS Brochure

List of major arterial road corridors with EMAS