Singapore already has road bases, apparently for aircraft up to F-16 size, according to this video...
...which supposedly has aeroplanes in it somewhere. If you can make it past the presenter, the F-16s are using some serious aerobraking.
Clearly the RSAF could use the F-35B from road bases in a STORVL mode. Which raises the interesting question of why they don't look at the F-35A. A little hotter on landing and take-off than an F-16, perhaps?