Not focusing on the specific city in the City Nerd video but its the most recent city with the best data on traffic:
https://youtube.com/watch?v=uXffDuVG2tQ:1015So in this video City Nerd complains about more walkability on the streets of Long Beach even hinting at a road diet but lets look at the Average Daily Traffic of Long Beach (2014):
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Now the road that City Nerd appears to be on is Ocean Blvd that has about 30,000 average vehicles per day. Other main thoroughfares in the city appear to have around 25,000 to 30,000 depending on the segments. But what is the average daily traffic that a road diet can
accommodate?
Such, a road diet on the main thoroughfares of the city is not advisable due to the high number of vehicles, which exceed the highest vpd estimate by 20%.