When horseless carriages first became legal, the legal requirement called for "a man with a red flag to walk in front of any self-propelled vehicle on a public

When horseless carriages first became legal, the legal requirement called for "a man with a red flag to walk in front of any self-propelled vehicle on a public road at no more than 4mph". http://www.datchethistory.org.uk/Link%20Articles/Ellis/evelyn_ellis.htm http://www.datchethistory.org.uk/Link%20Articles/Ellis/evely... In the future, if manual override becomes undesirable or unneeded, it will probably be repealed. Actually, I'm surprised by this many steps forward so soon (I was a bit cynical of them ever being approved)