Great concept with a cookie cutter execution. However, in this case you shouldn't go the creative route but stick with a web format that is well known, tested and user approved, making this cookie cutter the best thing you could have done.
You hit a home run here, at least IMHO. I'm not sure how well developed public transportation is in India, i'd consider your site a very valuable tool, though.
In addition to all the things already mentioned, in your parameter selection, the "tag" of "ADult" needs to have the capitalized "D" changed to lower case.
Also, your site is targeting bus rides, i'd say there should be some representation of public transportation via images. While your header is pretty nice and gives the user a vacation feeling, i wonder if it wouldn't make more sense to be visually closer to what you're trying to sell. At the same time, the logo is very nicely done.
The frame work is pretty much done, all you're missing is the DB that enables the searches, bookings, etc.
One thing that needs to be added: give users the ability to sign up for user accounts. especially people that travel the same route more than once will appreciate the fact that they can save their favorite travel routes. Also, registered users can obtain updates of special sales, discount fares, etc.
You can easily monetize registered user accounts because your advertisers would gain access to a very distinct target group. *just food for thought here

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At this time, for design, vision and idea: :tu:+1/2 out of 3 bring the rest up and make it functional and have a VERY decent site on your hands! Congrats!