Expressway Monitoring and Advisory System

EMAS enables Land Transport Authority (LTA) personnel to detect accidents and respond to them more quickly.

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.

EMAS consists of a network of electronic cameras and LED signboards located at strategic points along the expressways.

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.

An EMAS signboard along the Pan Island Expressway at Toa Payoh .
A small EMAS signboard along the Pan Island Expressway before its interchange with the Central Expressway .