A car doesn't have to have been made in the last 30 years, that's arbitrary. Many cars and trucks from the 70s had manual steering and brakes, Ford F series, J

A car doesn't have to have been made in the last 30 years, that's arbitrary. Many cars and trucks from the 70s had manual steering and brakes, Ford F series, Jeep CJs, etc. My technique is to power cycle the car just long enough to reset the radio. Also, the steering lock is easily unlocked quickly using the key, it's not as if I take the key out of the ignition and throw it out the window. There are also 2 positions on my ignition, like most cars. You can turn off the engine while keeping the accessory power on. That matters in my case because my car has fully electric power steering. Many "hyper milers" do things like this. There is a almost 10 mile long section of I-70 that is a famous grade. You can coast the whole way down. I used to coast down the whole thing in my civic, others do too. Really any car that can be flat towed can be safely driven with the ignition off. You see people doing this all the time, towing a car with a tow strap and a person operating the steering and brakes in the under tow car.