Making use of lines in photography can create pictures. There are alot of subways in Japan. Standing near to the the platform, there are alot of lines from 1 end to another end. When the train arrives, you get additional lines. By making use of the all the lines combined, you can take a photo of a train leaving the platform.. The shot will be look better if there's no man walking.. hee..  

In Tokyo 2007 by IK

In photo composition, we can use lines to draw the viewer attention and draw the viewer's eyes to follow instructions using a picture. Don't just use the rules of thirds everytime. Line up for a change.=)