One thing that I had to train myself to do when I first came here was to walk on the left side. I used to walk on the right side when I was in the Philippines. In the schools that I attended (grade school at Angeles University Foundation and high school at Sta. Catalina College in Manila), there were even signs or reminders to walk on the right side since we also drive on the right.
It wasn’t easy and it took a lot of conscious effort to “untrain” myself of right side walking. Now that I’m a left-side walker, thanks to my six years of stay in Korea, the Seoul City government has been campaigning for right-side walking. They had even changed the directions of escalators like the one below.
Posters informing people to walk on the right side are also found everywhere. Stairs also have signs, and yet people still climb up and down on the left! It would take some time before people should be expected to adapt to right-side walking.
A few months ago, the city government also launched a campaign for people to just stand on the escalator and not use it as a treadmill. Subway escalators have lines in the middle so people could stand on the right and walk (or run) on the left side. This campaign isn’t so successful as people still stand on the left and run on the right.