This is to share my experience and thoughts on how to push a small bicycle up the Braddell road bridge "connecting" the Kallang PCN between Bishan and Toa Payoh. Some background about this bridge can be found
here, and
here.
First, if you are pushing a full size and heavy enough bicycle, I don't think you would experience much issues. I have been pushing my old skool 26" hybrid bicycle up this place many times. However, I noticed many folding bike riders prefer to carry their bicycle up. I didn't know why until the first time I pushed my 20" Polygon Urbano 3.0 bicycle up this bridge. After doing so a few times, I think I know the issue. Below I'll share my experience:
Typically cyclists push their bicycles by holding the handle bar, allowing them to control the direction.The problem I had when pushing the folding bicycle is that the rear wheel kept slipping inwards on to the steps. This is irritating.
Thus, one way is to have one hand holding the saddle while the other holding the handle. However, with only one hand holding the handle bar, it is more challenging to control the direction.
Anyway, after exploring different ways of pushing, I found that I could push my folding bicycle easily with one hand at a lower position nearer to the frame (see blue arrow head in diagram below). For folding bicycle like mine, I can still control the direction holding here. My free hand can carry other stuff, e.g. my son's balancing bike, so I don't need to make another trip.
Partial force diagram illustration
Then, I gave some thoughts about it and figured out a reason for my method.