When defending against a speeding ticket, it is a good idea to examine the accuracy of the radar or speed detection device used by the officer. Challenging the calibration and maintenance records of the equipment can potentially weaken the case against you. Additionally, you may be able to argue that the signs on the road were unclear, making it difficult to determine the speed limit, or you can show that road conditions affected your speed. Presenting evidence of a valid reason for exceeding the speed limit, such as a medical emergency, could also be a valid defense. Ultimately, the best defense depends on the specific circumstances surrounding your ticket.