THE Land Transport Authority on Friday said traffic marshals will ply all expressways in Singapore from July 1 to keep them smooth-flowing and help clear road incidents speedily.

These marshals first came to the scene last October and were deployed to clear traffic holdups on the Kallang-Paya Lebar Expressway (KPE), Central Expressway (CTE) and Fort Canning Tunnel.

They have since been zipping around in their Piaggio scooters or Subara Imprezas, helping to clear incidents, such as breakdowns and accidents, that impede traffic flow.

With these marshals, the LTA expects to clear 75 per cent of expressway incidents within 12 minutes of arriving at the scene.

They will complement existing expressway management systems like the Expressway Monitoring and Advisory System (Emas) and towing services to bring traffic flow back to normal as fast as possible.

These Auxiliary Police Officers are empowered to perform traffic control duties as well as preserve evidence at accident scenes.

The officers are also trained in first aid, and are authorised to take down the particulars of errant motorists and pass them on to the Traffic Police.

Linked to Certis Cisco's satellite-tracking system, these officers will be deployed once expressway cameras spot an incident.They are expected to arrive at the scene within eight to 15 minutes.

This operation will be extended to KPE Phase 2 when it opens to traffic on Sept 20.

"The initiative is part of LTA's continual efforts to optimise the road network and ensure smooth traffic flow. LTA will continue to work with the Traffic Police to manage incidents that affect the traffic," said LTA.