In countries where driving is on the right hand side of the road, the term track stand isn't really accurate. In order to remain as stationary as possible, the rider has to balance using the crown of the road which is to their left. In a velodrome, the uphill side of the surface is to the right. I can remain stationary through a stoplight cycle on the road here, but when I tried it in a velodrome I was totally thrown off by having the uphill on my right side