Do you currently have car insurance? Insurance is mandatory to drive in California Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question What is the legal length limit for double-trailer combinations? Answers 34 feet 53 feet 61 feet Explanation In Washington State, a double-trailer combination may not exceed 61 feet in length. Take a FREE Practice Test Now This questions appears in the following tests: Washington Knowledge Test Class B ,