added comments 
remove the gamecache test class
new method to validate the vehicle to pass through the signal point 
this replaces the existing method
some changes which makes real movement of vehicles on board 
and updated unit test cut short method calls in src and unit tests
reformatted code removed javadocs for getXXX and setXXX , constructors,
rearranged code
reduced repetitive unit test cases method and method calls
reduced repetitive unit test cases method and method calls
reduced repetitive unit test cases method and method calls
modified the jsp page