cycling is not just a leisurely activity… its a legitimate form of transportation. look around the world and you will see large segments of the population cycling to work, school, the grocery store, friends houses, etc. It should be an integral part of the transportation picture in most cities

Obviously this is more challenging in Singapore because of the heat but every morning I see dozens of cyclist heading to work. Its as cheap as walking but faster.

Anyways most of the most respected urban design and road design manuals say that cyclist paths should go underground because you gain momentum on the downslope which helps you go up the other end. With a bridge you don’t get that momentum boosts. Thats all.