Podcast
Stuff You Should Know
It was mentioned as containing interesting firsts related to American road infrastructure, such as the standardization of left-hand driving and the introduction of center dividing lines and no left turn signs.
And there's a few other firsts listed in that book which are kind of interesting.
— Episode: Short Stuff: Traffic Signals
Episode: Short Stuff: Traffic Signals
It was mentioned as containing interesting firsts related to American road infrastructure, such as the standardization of left-hand driving and the introduction of center dividing lines and no left turn signs.
And there's a few other firsts listed in that book which are kind of interesting.