California does not require a supplemental braking system per se. What they do require is that you are able to stop your vehicle and/or combination of vehicles within a certain number of feet at a particular speed. (California Vehicle Code Section 26454(a))That said, here's the common sense rule. Supplemental braking systems fall under the safety issue when traveling. As such there is no reciprocity agreement between states. This means that just because it's legal in California, your home State, not to have a supp braking system, it may not be legal in say Utah, where a supplemental braking system is required. Therefore, to be legal no matter what State you're in, invest in getting a decent system. You'll feel safer besides. We've used the ReadyBrute/ReadyBrake system for seven years now and IMO it's the simplest and easiest system out there. The braking system is built into the towbar assembly which stays on your coach. There is a cable that connects from your car's brake pedal to the towbar assembly. As you brake the coach, the brakes on the toad are automatically applied. The whole system will run less than $1000 and you can find them used for much less. Installation takes a couple hours or you can have it done professionally for less than $200. No matter what system you buy or even if you choose not to buy anything, be sure to install the ReadySTop system available from the same company. The ReadyStop is designed to stop the toad should it become disconnected from the coach...the link is below.....Dennis
Ready Brute Ready Brake Ready Stop