NSW Premier Barry O'Farrell on Tuesday announced a range of measures targeting drunken violence, including laws to force venues in Sydney's CBD to lock out new customers from 1.30am.

The service of alcohol in venues will cease by 3am and bottle shops will need to stop trading at 10pm.

The state government has also announced a risk-based liquor licensing scheme, something that has been in operation in the ACT for years.

Mr O'Farrell announced mandatory minimum sentences of eight years for fatal one-punch attacks involving alcohol or drugs.

There were also mandatory minimum sentences announced for other drug or alcohol-fuelled offences, including affray, assaulting police, reckless wounding and sexual assault.

Reacting to the announcement, the ACT government said it would consider many of the reforms proposed by NSW, as it continues to review the effectiveness of its own 2010 liquor laws.

The ACT's 2010 reforms included measures such as bolstering police and regulatory powers, setting up risk-based licensing fees, and more closely scrutinising liquor licences.

The government also introduced a series of on-the-spot fines for patrons and venues, and gave itself the power to order lockouts, and for police to shut down bars or clubs for 24 hours.

Ms Gallagher said the reforms had proved successful.

''I welcome moves by the NSW government to consider measures that the ACT government has already put in place and are proving successful,'' she said.

She said all the measures put forward by NSW would be considered by the government, including through the current review of the ACT's 2010 liquor reforms.

Opposition Leader Jeremy Hanson said the Canberra Liberals would ''look closely'' at tougher sentences for single-punch assaults and steroid possession.

Mr Hanson said he supported the intent behind the NSW Premier's alcohol-related violence reforms, and said he would be speaking with Mr O'Farrell about the package ''sooner rather than later''.

But he said the opposition did not believe lockouts or trading hour reductions would be suitable for Canberra.

The NSW government on Tuesday announced that more buses would service Sydney's central business district.

That is something Mr Hanson believes should be looked at in the ACT, where late-night buses are almost non-existent, save for the Nightrider service.

''Getting people off the streets is important, so we're certainly open to looking at whatever measures are suggested to get people out of Civic easily and more quickly,'' he said.''But I'm not, at this stage, proposing anything specific.''

He said the government should also look at the role that drugs, chiefly ice, played in the violence.