balwis...you will have a maximum of QR 500 only, because you stopped and reversed back. It is possible that you will not have any fine at all. This is line with the new traffic rules introduced at the beginning of 2011...you can search the gulf times archives for the news. However if you have crossed the signal and went on ahead your fine will be minimum 3000 to max 6000.please let us know what happened after about 1 week. we will have a confirmation of one of the facts stated above