What is the difference between Black Board and Red Board City buses?

I here that in Bangalore City, there are two types of city buses (bmtc) i.e Black Board and Red Board. How are they different. If I am not mistaken, then I think that it is the difference in operating areas. But I dont have clear picture of this.

Cyberstalker2013-06-18T09:57:56Z

Favorite Answer

Black board - Short distance, low fare
Red board - Long distance, city outskirts, to some halli, high fare, but not as high as pushpak.

Now answer mine,

http://answers.yahoo.com/question/index;_ylt=Arx8_aaYG5wqQKJdUjEJXYDty6IX;_ylv=3?qid=20130617160415AAtympx

?2014-11-20T01:05:37Z

complex thing. do a search on to yahoo or google. that could help!