There has been an overwhelming response to a public invitation to tour Terminal 4 before it opens later this year.
All 75,000 free tickets for weekend slots and for National Day were snapped up within 24 hours of registration last Wednesday, Changi Airport Group said. Slots for Thursday, Aug 10 - a school holiday - have also been fully booked.
On average, the public has snapped up more than six in 10 tickets available for the two-week open house from Aug 7 to 20, airport spokesman Ivan Tan told The Straits Times.
The public tours are expected to attract up to 200,000 residents.
Public excitement is high, with T4 set to have unique features, including traveller facial recognition technology, kinetic art displays, a heritage zone and specially curated sculptures.
Teacher Eric Yue, 38, booked six tickets for his family - the maximum allowed for each person - for Aug 10. "I got the tickets on the first day that they were made available online. As a citizen, I am naturally excited about new developments in Singapore," he said.
"T4 will be another new flagship of our nation, and I would like to be one of the first to be able to step inside and experience it."
More than 300 Changi Airport staff as well as employees of various airport partners have volunteered to be service ambassadors and hosts for the two-week event, Mr Tan told The Straits Times.
Guided by an app, visitors will tour T4 on a specially curated route, which will take about 90 minutes to two hours.
Volunteers - up to 100 a day - will be deployed at key points of interest to engage and assist visitors, Mr Tan added.
Visitors can get to the terminal by taxi, take the airport's complimentary shuttle bus service from T3, or travel via new roads that have been built.
A new flyover from the Pan-Island Expressway leads vehicles directly across Airport Boulevard to T4, while those coming from East Coast Parkway will be directed onto a flyover to make a U-turn to the other side of Airport Boulevard before joining a slip road leading to T4.
To ensure that all goes well during the two weeks, only those with confirmed tickets will be admitted.
Mr Tan said: "Visitors will be required to show their confirmation e-mail... We will strictly enforce this and those without a ticket will be turned away. This is to ensure a smooth flow and good experience for registered visitors."
It took about four years to construct the 225,000 sq m, double-storey terminal, which can handle 16 million passengers a year.