First of all 
To test for the presence of 3 lights in a column wise or 
Row wise manner.
secondly to test for the presence of first light should be 
Red,second should be Brown and third light should be Green.
Third to test for the functionality of all three lights.
i.e it should glow in a sequential order first Red then 
Brown and lastly Green.
To test all the three lights should not glow at a  time.

First of all we should check for three colours and three 
direction signals
The three colours should me red,orange,green
secondly if the signal is red the traffic should stop
thirdly if the signal is green the traffic should move and 
it should the directions that the persons who are going to 
right should move right if the right arrow single is green 
if the right direction light is off they should stop and 
the other direction people should move.In the same manner 
we should right for other directions also.

First check for color 

First RED
Second Yellow
Third Green

Suppose if there is any time Duration check is signal 
lights are getting changed automatically

Ensure that only one light is on at a time 

Suppose if Pedestrain Crossing is there means Ensure 
that the lights are ON/OFF Properly based on the signal


Vinodh Anandhan
Software Tester
Exceed Technologies (P) Ltd.,
9944114400
Chennai
vinodh.anandhan@exceedintl.com

Hi,

Step1:- Verify whether three windows are available or not
Step2:- Verify the sequence of windows as mentioned below
         a)Red.
         b)Yellow.
         c)Green.
Step3:- Verify that all colour should not be on at a time.
Step4:- Verify that first "Red" should be on, then "Yellow" 
and then "Green".(Based on the duration set).
Step4:- Verify when the signal is Red then the Green signal 
for pedestrians should be 'GREEN '.
Step5:- Verify when the signal is Green then the Green 
signal for pedestrians should be 'RED'.

These are the basic and very very useful test cases and we 
can design more and more based on the requirement document.

Suraj Ramanujadasa