On 6 October 2021, the Home Team Science and Technology Agency (HTX) rolled out a three‑week pilot that placed two autonomous wheeled robots, called “Xavier,” on patrol in the Toa Payoh Central area of Singapore’s public housing. The trial aimed to see whether such machines could support human officers by handling routine surveillance, thereby freeing officers for more complex duties.
Xavier units are roughly the size of a small golf cart and travel at a walking pace. Equipped with 360‑degree cameras, a suite of sensors and a speaker, they follow pre‑set routes through the neighbourhood’s shops and residential blocks. While on patrol, they broadcast recorded reminders about COVID‑19 safe‑distancing, urging people to keep at least one metre apart.
The robots also scan for prohibited conduct such as smoking in non‑smoking zones, illegal parking and loitering. HTX stresses that the machines do not make autonomous decisions.
Live video feeds are streamed to a command centre where human operators assess alerts. If a potential violation is identified, an officer can speak through the robot’s speaker to issue a warning or dispatch a nearby patrol. “The robots are designed to augment our officers, not replace them,” an HTX spokesperson said.
“They handle repetitive patrol tasks so our people can focus on higher‑value work like community engagement and responding to incidents.” Public reaction in Toa Payoh was mixed. Some residents and shop owners welcomed the added sense of security, especially during late‑night hours.
Others expressed discomfort with constant surveillance. A 62‑year‑old resident described the robot as “intrusive,” yet acknowledged the intention behind it. HTX clarified that the trial was limited in scope and duration, and that data gathered would be used to refine the system rather than to create a permanent surveillance network.
Importantly, the robots do not employ facial‑recognition technology, a point highlighted to address privacy concerns. Technically, each Xavier runs on batteries lasting about eight hours and can navigate curbs, ramps and pedestrian crossings.
They are weather‑resistant but not built for heavy rain or extreme heat. During the trial, HTX tracked performance metrics such as detection accuracy, battery endurance and public interaction. The robots proved effective at spotting clear violations like illegal parking, but struggled in crowded settings where multiple people moved simultaneously.
“We learned that the robots work best in predictable environments,” the HTX spokesperson noted, adding that human judgment remains essential in chaotic situations. The experiment fits into Singapore’s broader smart‑city agenda, which seeks automation solutions to counter a shrinking workforce and rising demand for public‑safety services.
By focusing on public housing estates—home to roughly 80 % of the nation’s residents—the trial addresses a large segment of daily life. International observers have taken note; Japan has introduced robots in malls and stations, while the United States employs drones and ground robots for perimeter security. A technology analyst from the National University of Singapore commented that Singapore’s approach demonstrates how robots can be integrated into dense urban environments, provided transparency and public trust are maintained. The robots are not intended to chase suspects or intervene physically, but they can act as visible deterrents and augment stretched police resources.
The Toa Payoh pilot concluded in late October 2021. HTX is now analysing the results to decide whether to extend the program to other estates, though no timeline for a broader rollout has been set.
The experiment has already sparked discussion on the future of policing, privacy and automation in Singapore, showing that while robots will not replace officers, they may become a regular part of the city’s public‑service toolkit.
