In the race to deploy driverless public transport, Singapore has built a mini town that could vault it into pole position.
The 2-hectare complex, unveiled in November, has intersections, traffic lights, bus stops and pedestrian crossings, all built to the specifications that Singapore uses for its public roads. There’s a mini-hill to check how vehicle sensors perform when they can’t see direct- ly ahead, mock skyscrapers to mimic the radio interference from tall buildings, and a rain machine to simulate the island’s frequent tropical downpours.
The advantage f or t he city-state is that the test circuit – and the information provided by companies vying to put driverless buses on Singapore’s streets – is helping it build an unrivalled database of information on the challenges and solutions that would allow the government to introduce the technology safely.
“We’re probably the only country that’s looking at this in such a pro-active and systematic way,” says Lee Chuan Teck, former deputy secretary at the Ministry of Transport. “What we’re looking at is actually deploying regulations.”
Lee says the data being gathered should allow the government to draft regulations for autonomous vehicles by the second half of this year. The nation’s small size, advanced road infrastructure and highly regu- lated traffic system make it an ideal petri dish for companies that are developing driverless systems.
There are now more than 10 companies testing vehicles at the facility at Nanyang Technological University in the west of Singapore, says Niels de Boer, programme director for Future Mobility Solutions at the university. Two buses from Volvo AB will join them early next year and more are coming, he says.
With so many hazards and intersections on the route, the speed limit at the site is about 20 to 25kmh. De Boer says that they want to see what happens under a “controlled environment”.
Seven 360-degree cameras stream live video to the Land Transport Authority’s Intelligent Transport Systems Centre downtown. Together with information collected from the vehicles, the government is building a database that will allow it to evaluate whether EVs are ready for public roads and how they should be deployed.
Nanyang Technological University is testing a 15-passenger driverless minibus built by French company Navya SAS, which researchers can operate using the autonomous software, or manually via a video-game style handset.
On a recent, hot morning, it trundled round the course with air-conditioning on full, cutting its seven-hour battery life in half. The bus navigated lanes, halted in front of a wayward pedest r i a n in t he road and stopped at bus shelters to collect and deliver passengers, though some functions, such as moving off at traffic lights, still had to be manually initiated.
On one occasion, it made an Seven 360° cameras stream live video from the mini town at Nanyang University emergency stop for some unseen obstacle, throwing passengers onto the floor.
The only place the bus didn’t go was the rain simulator, which de Boer says wasn’t working after being damaged in a recent thunderstorm. So far, vehicles tested in the rain machine hadn’t performed well, according to staff on site. In about 70 per cent of cases, the sensors on the vehicles were unable to operate successfully.
A Navya SAS autonomous electric passenger bus on the test circuit at the Nanyang Technology University in Singapore last week.
The university’s test bus may not be the most sophisticated experimental autonomous vehicle in use, but it did demonstrate that driverless vehicles still have many obstacles to overcome. While the use of AI means that the machines will learn rapidly from their errors, the real lesson from the test park is the need for a sophisticated infrastructure outside the vehicles.
“Infrastructure will become more important,” says de Boer. “It’s not enough to know where the vehicle is.” Operators and traffic officials must also monitor many other possible events – an elderly passenger falling down inside a bus, an unusually large queue at a bus stop, breakdowns and other events.
Singapore’s efforts to certify driverless public transport could put it in the lead for autonomous buses as more companies bring vehicles to NTU’s test track.