* Australian state to open pop-up car parks
* New South Wales tells people to use bikes to get to work
* State says school children will return to school on May 25 (Adds date that Australia's most populous state returns to full-time school)
By Byron Kaye
SYDNEY, May 18 (Reuters) - Australians in the country's most populated state began their first full week of loosened coronavirus lockdown measures on Monday, with officials urging commuters returning to offices to avoid catching peak hour trains and buses.
New South Wales (NSW) state Premier Gladys Berejiklian said people should travel in off-peak times, ride bicycles or drive to work to prevent overcrowding on public transport.
Australia's states and territories are beginning to allow more public activity under a three-step government plan after two months of shutdowns that officials have credited with keeping the country's exposure to the pandemic relatively low.
NSW, which includes Australia's most populous city Sydney, reported just one new infection in the previous 24 hours. The state also reported one additional death, the first nationally in almost a week, taking the nationwide toll to 99 from 7,060 infections.
"We normally encourage people to catch public transport but given the constraints in the peak and the fact we are exercising social distancing, we want people to consider different ways to get to work," Berejiklian told reporters in Sydney.
"Places in and around the CBD (central business district), but also in employment hubs, will be investigated and more pop-up parking stations will be made available," she added.
Berejiklian gave little detail about the proposed "pop-up" parking lots, which were among plans that also included more cycleways.
For people still catching trains and buses, the government is ordering "intense and ongoing cleaning" across the public transport network, she said.
NSW SCHOOLS TO REOPEN
Her comments came as the number of new coronavirus cases reported nationwide slows to fewer than 20 a day, encouraging NSW to announce that all school children would return to full-time face-to-face teaching on May 25.
Neighbouring Victoria state, which along with NSW accounts for more than half Australia's 25 million population, reported six new cases of coronavirus in the 24 hours to Monday.
Twelve McDonald's Australia restaurants in Victoria were closed after a delivery driver tested positive to the illness, local media reported.
McDonald's Australia CEO Andrew Gregory was quoted in local media as saying the driver was not symptomatic and that no McDonald's diners were at risk of contracting the illness from the driver. McDonald's Australia is a separate corporate entity to McDonald's Corp (NYSE:MCD) MCD.N .
A row was brewing between NSW and its northern neighbour Queensland after the latter's leader, Annastacia Palaszczuk, said the state border could be closed until September. Queensland reported two new cases over the past 24 hours.
In response, NSW's Berejiklian said there was a benefit to retaining the national border closure only.
Australia is among dozens of countries pushing for an investigation into the origins of the new coronavirus when the World Health Assembly, the decision-making body of the World Health Organisation (WHO), meets in Switzerland this week for its first annual meeting since the COVID-19 pandemic began. issue has led to a diplomatic spat with China, where the virus first emerged. Australian Foreign Minister Marise Payne said on Monday she was "very encouraged by the growing levels of support" for the inquiry.