As a concept this has been around for as long as automobiles. It goes in and out of fashion dependent on the attitude of the buying public and the state of (their and) the states finances. Read more
Now, that might sound like a derogatory statement about cyclists, however, look at the statement in another way.
When I was taught to drive (not ride a bike) and ever since, I was reminded that “drive like the other guy is going to do the unexpected, pull out of a side road when I was approaching, overtake on a blind bend, open a door when I was going past, whatever you thought no they have seen me, they will not do that, guess they will”.