Commuters can now take driverless buses in two areas of Singapore for a small fee, in the first such trial since the Republic began experimenting with autonomous vehicles on the roads in 2015.

The new services, headed by ST Engineering, are operated by SMRT and SBS Transit, the two largest bus operators here.

They will run in Singapore Science Park 2 near Haw Par Villa and on Jurong Island, with a round trip costing 40 cents and $2 respectively. It will be the first time driverless bus services in Singapore have collected fares from passengers and generated revenue.

The aim is to bring the technology a step closer to becoming a part of Singapore's mainstream public transport system.

The trial, which will continue until April 30, will provide real-world data on what is needed for these buses to be rolled out commercially in both local and overseas contexts.

Companies in the region are already expressing interest in the buses' viability in their countries, said ST Engineering group president and chief executive Vincent Chong.

The pilot comes after the KPMG autonomous vehicle readiness index last year ranked Singapore first in the world.

Those involved said they were committed to maintaining Singapore's edge in the burgeoning area, which could reap economic returns for the country once it takes off.

Transport Minister Ong Ye Kung, who was at the official launch of the two routes yesterday, praised the practical nature of the projects.

"Sometimes we can research and prepare and plan when often it is better to just start doing something, and learn along the way," he said. "In that way, you accelerate the learning process so that we are able to make autonomous bus services a reality sooner."

He added that driverless buses still have some way to go to be integrated into the system, but that it is a very exciting technology that could possibly be applied to Housing Board towns in the future.

A handful of trials of driverless buses have been conducted in the past five years, although they were not fee-paying.

One of the most high-profile was a three-month operation in Sentosa in 2019 that ferried more than 6,000 members of the public - free of charge - without any incident.

For the new trial, the slower speed limit and less congested traffic in the areas where it is being held match regulations on autonomous vehicles from the Land Transport Authority (LTA).

At all times, a driver stays at the wheel in case of emergencies, while a bus ambassador is also stationed on the vehicle to address commuters' questions and concerns.

In the Singapore Science Park 2 part of the trial, the driver switches from automatic to manual mode in West Coast Highway and Pasir Panjang Road between the park and Haw Par Villa MRT station, in accordance with LTA's geographical restrictions on where these autonomous vehicles can operate.

For now, buses in the new pilot are operating on an on-demand basis, where commuters make a booking on an app, pay their fares using credit or debit cards, and board the bus when it makes its loop during specified time periods.

Mr Harry Lim, 56, who works in a smart innovation lab at Singapore Science Park, said he was persuaded to use the service as a driver is always present.

He has taken the service about three times in the past week, and said journeys have all been smooth.

"The previous bus service is quite irregular, so this helps me plan my trip better," Mr Lim said.

Mr Ong said drivers will remain essential to the operation of autonomous vehicles even when these do take off, although their job scope will change.

For instance, a driver might have to commandeer the vehicle should there be an accident on the road, or if someone in a wheelchair needs help boarding the bus.

He added: "If this becomes successful, it will greatly reduce our reliance on foreign manpower and physical manpower."

The pilots are organised by an Alliance for Action on Robotics - which brings together transport stakeholders - set up by the Government to promote the use of robotics in land transport and cleaning.

It falls under the Emerging Stronger Taskforce created last year to chart Singapore's recovery and create jobs that will be sustainable after the pandemic.