[yvonne]

President Nixon, citing gasoline shortages triggered by the OPEC oil embargo, imposed a federal speed limit of 55 mph in November 1973. The embargo ended four months later, but the federal speed limit lasted another 20 years. That's a good example of what I'm talking about.

This is apropos Garvin's post, but kind of off the topic of the thread, but could someone explain something to me? A few weeks ago, someone said that the 55 MPH speed limit led to congestion. I can see how increased volume leads to lowered speeds, but I can't see the how reduced speed leads to increased volume.

[yvonne]

President Nixon, citing gasoline shortages triggered by the OPEC oil embargo, imposed a federal speed limit of 55 mph in November 1973. The embargo ended four months later, but the federal speed limit lasted another 20 years. That's a good example of what I'm talking about.

This is apropos Garvin's post, but kind of off the topic of the thread, but could someone explain something to me? A few weeks ago, someone said that the 55 MPH speed limit led to congestion. I can see how increased volume leads to lowered speeds, but I can't see the how reduced speed leads to increased volume.