Comment Re:Lets be honest here (Score 2) 109
Back then they didn't understand, or didn't see a need, for merging lanes. Freeways were going to solve all traffic problems. They thought the high speeds and free-flow would mean there would always be huge gaps between vehicles with more than enough room to merge in easily.
There may also be a holdover component to the original "yield to the right" rule. That was the overriding rule for much of early motoring, hence the term "right of way." So highway traffic may well have been expected to yield or move over for entering onramp traffic, hence no need for merge lanes. We quickly discovered why that doesn't work, and "yield to the right" has been relegated to 4-way stop signs and pretty much nothing else.