This is a one of the many kinds of bus stop in Singapore. For every pillar at all the various bus stops, you can see a number. It's the Bus Stop number. For example, this one has 11261 on it.
I have been noticing these numbers because I have been using it. I open the internet browser on the mobile phone, enter the bus stop number, the service I am taking and it will tell me when the bus is arriving!
You can try it out! This stop is the Holland Village bus stop. (11261).
Key in the SBS Transit buses route number. You can see when the next bus is coming! It's quite cool. http://www.sbstransit.com.sg/iRIS/overview.aspx
Currently only SBS Transit buses have such facility.
I access the site using the mobile version at (http://www.sbstransit.com.sg/mobileiris) which has no graphics. So the GRPS charges each time I check is only 2 cents on my mobile plan :-)