Popular US-based app Uber and other ride-sharing operators will be able to legally pick up passengers from October 30 in Canberra, with the Australian Capital Territory government requiring drivers and vehicles to undergo accreditation and registration.
While Uber has been popular with commuters around the world, it has faced backlash from traditional taxi operators and some governments, and been hit with legal challenges in cities including Brussels and Jakarta.
"It demonstrates a jurisdiction like the ACT can take a national, and indeed an international leadership role, in working with new technology, embracing changes in the way services are delivered to communities."
The ACT government said legalising ride-sharing services would help reduce fares for commuters and encourage innovation in the transport industry.
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To offset any fall in demand for taxis, it added fees for taxis and hire cars would be halved from 2016 and halved again in 2017.
Barr's announcement came a few days after authorities in Australia's largest city Sydney issued 40 three-month suspensions to drivers offering ride-sharing services, saying they breached passenger transport laws.
Thousands of taxi drivers also took part in protests in early September in Sydney, Melbourne and Brisbane against Uber, arguing the service was illegal and unsafe.
One of the few governments to regulate ride-sharing has been the Philippines, which in May become the first country in the world to establish national rules governing such services.
The ACT has historically taken a progressive stance on issues, such as becoming the first city to legalise same-sex marriage in 2013 before the High Court struck down the law.