Some of the roads in Singapore had been made in such a way that it
could be converted into runways in times of emergency. The roads are strengthened and
also, the emergency runways are often tested out during military exercises to ensure
that the roads are still in working conditions and the pilots can familiarize with landing
on the roads which are used be cars in times of peace.
This allows the airforce to have maximize use the the land here in Singapore where land is
scare.