Actually, there is something fishy about the Chennaisamudiram and SriPerembudur toll's. If you examine them, both these toll plaza's do not have the automatic gates and also unlike the others, there are no personnel seated outside the toll booth involved in writing down your vehicle's number. What I mean to say is that you need not pay in these as they never try to stop you if you deny payment. I have never paid in these two toll plazas for the past 4 to 5 months. Try it the next time, just look straight and drive ahead, no one will bother to stop you. @teky, I have not tried the method of flashing the lights though!