According to the California Vehicle Code (CVC 22502), when you park on a public street, your vehicle's wheels must be parallel to and within 18 inches of the right-hand curb. If you are on a one-way street, you may also park within 18 inches of the left-hand curb. Parking further than 18 inches from the curb is considered "double parking" or obstructing traffic, which can result in a significant fine and, in some cases, your vehicle being towed if it creates a hazard. This rule is strictly enforced in urban centers like Los Angeles and San Francisco, where narrow streets make traffic flow critical. Additionally, your tires must be facing the correct direction; you cannot park "against" the flow of traffic (parking on the wrong side of the road), even if you are within the 18-inch limit. For those parking on hills, California law also requires you to "curb your wheels"—turning them toward the curb when facing downhill and away from the curb when facing uphill—to prevent the car from rolling into traffic if the emergency brake fails. Staying within that 18-inch window is essential for both legal compliance and the safety of cyclists and other motorists.