I ended up on this last year as I was exploring the South West. I found it confusing even as a Canadian.

I then later was confusion when Google Maps told me to go 80 on Hwy 10 in Texas once I came up from Big Bend NP. I thought the GPS was confused. 80 kms on the highway in the US? It was then I realized I wasn’t in Oregon anymore with their 60 mph highways. Texas goes fast and even 80 mph isn’t enough for most people. Even the single lane highways with construction workers was 65 mph work zones in Texas.

It was the most amount of road kill I’ve ever seen in all my travels. I think at one stage a herd of goats must of tried to cross the highway based on the carnage I came across. I finally understood the reason for the huge bumpers on the front of trucks in Texas now.