While insisting they still want people to catch public transport and walk and cycle, the Liberals say Canberrans shouldn't be "punished" for driving a car - as they claim motorists have been under the Barr government.

"There is a real disconnect between the ACT Labor government and Canberra households," Opposition leader Alistair Coe said.

"They use their cars because they need them. If Labor and the Greens keep trying to drive people out of their cars, it's going to have an impact on quality of life."

The Canberra Liberals announced the first planks in the transport platform on Monday, which marked the start of the first full week of the ACT election campaign.

Building on their promise to slash car registration fees by up to $98 per vehicle, the Liberals have pledged to spend $50 million to build 2500 carparks across Canberra in the first term of a Coe government.

The Liberals claim there is a shortage of carparks in many areas of Canberra, in particular local shops and town centres.

Urban services spokeswoman Nicole Lawder pointed to Greenway in Tuggeranong as one area which needed more carparks. She said the other locations would be chosen in consultation with the community.

The Liberals have also promised a six-month trial of free parking after 5.30pm in an attempt to boost night-time activity.

The announcement on Monday include a suite of proposals designed to speed up motorists' commute times, including a move to allow cars with three or more passengers to travel in bus lanes during peak periods.

It would also look to introduce real-time monitoring of construction and road works, helping motorists to better plan their trips.

The Liberals' push to support the city's motorists seemingly creates a point of difference with the Labor government, which has been pushing Canberrans to catch public transport and use "active travel" - walking and cycling - through successive transport policies.

The government's climate change strategy, released last year, even advocated for "car-free days" as part of a broader plan to cut down transport-related carbon emissions, which account for about 60 per cent of overall emissions.

More than 90 per cent of transport-related emissions come from private vehicles.

The party's transport spokeswoman Candice Burch said the Liberals still wanted people to walk, cycle and catch public transport, with policies in those areas to be announced during the campaign.

"However we acknowledge they [public transport and active travel] are not viable options for many Canberrans families," she said.

"Many Canberrans do need to rely on their vehicles to get to and from work and to and from school. We don't believe that people should be punished for driving as they are under the current Labor-Greens government."

Following the announcement of the $50 million carparking fund, as well confirmation the car registration scheme would cost about $100 million over four years, Mr Coe again faced questions on Monday about how a Liberal government would fund its promises, without cutting services, given its pledge to freeze rates.

Mr Coe once again refused to answer those questions directly, as he again insisted the Liberals wouldn't cut public service jobs or services if elected.

Labor again took Mr Coe to task about his failure to explain how the Liberals would fund their commitments.

"They need to explain how they will manage the territory budget given they intend to collect less revenue and spend more money. They can't do that without cutting jobs and essential services or growing government debt," a spokeswoman said.

"This is yet another half-baked policy suggestion from an inexperienced leader."

The spokeswoman said the Liberals also needed to detail where the 2500 carparks would be built.